Bill Fisk, of Henderson, N.C. works on protest signs during a rally, Sunday, Sept. 2, 2012, in Charlotte, N.C. Demonstrators are protesting and marching before the Democratic National Convention. (AP Photo/Gerry Broome)

Demonstrators speak during a protest march in Frazier Park, Sunday, Sept. 2, 2012, in Charlotte, N.C. Demonstrators are protesting before the start of the Democratic National Convention. (AP Photo/Chuck Burton)

People walk to a protest rally, Sunday, Sept. 2, 2012, in Charlotte, N.C. Demonstrators are protesting before the Democratic National Convention. (AP Photo/Mike Stewart)

A sand sculpture created in the likeness of President Barack Obama is on display in downtown, Sunday, Sept. 2, 2012, in Charlotte, N.C. (AP Photo/Chuck Burton)

A man walks near a sand sculpture created in the likeness of President Barack Obama in downtown, Sunday, Sept. 2, 2012, in Charlotte, N.C. (AP Photo/Chuck Burton)

Demonstrators move toward downtown during a protest march, Sunday, Sept. 2, 2012, in Charlotte, N.C. Demonstrators are protesting before the start of the Democratic National Convention. (AP Photo/Patrick Semansky)

A police officer stands neat a protest area, Sunday, Sept. 2, 2012, in Charlotte, N.C. Demonstrators are protesting before the start of the Democratic National Convention. (AP Photo/Mike Stewart)

Demonstrators move toward downtown during a protest march, Sunday, Sept. 2, 2012, in Charlotte, N.C. Demonstrators are protesting before the start of the Democratic National Convention. (AP Photo/Gerry Broome)

Demonstrators move toward downtown during a protest march, Sunday, Sept. 2, 2012, in Charlotte, N.C. Demonstrators are protesting before the start of the Democratic National Convention. (AP Photo/Gerry Broome)

Demonstrators speak and move toward downtown during a protest march, Sunday, Sept. 2, 2012, in Charlotte, N.C. Demonstrators are protesting before the start of the Democratic National Convention. (AP Photo/Chuck Burton)

Charlotte Police Chief Rodney Monroe walks with protestors during a demonstration, Sunday, Sept. 2, 2012, in Charlotte, N.C. Demonstrators are protesting before the start of the Democratic National Convention. (AP Photo/Chuck Burton)

Charlotte Police Chief Rodney Monroe walks with protestors during a demonstration, Sunday, Sept. 2, 2012, in Charlotte, N.C. Demonstrators are protesting before the start of the Democratic National Convention. (AP Photo/Chuck Burton)

Police Capt. BD Patterson fist bumps with demonstrator Vermin Supreme during a protest march, Sunday, Sept. 2, 2012, in Charlotte, N.C. Demonstrators are protesting before the start of the Democratic National Convention. (AP Photo/Gerry Broome)

Demonstrators walk during a protest march, Sunday, Sept. 2, 2012, in Charlotte, N.C. Demonstrators are protesting before the start of the Democratic National Convention. (AP Photo/Patrick Semansky)

Demonstrators walk during a protest march, Sunday, Sept. 2, 2012, in Charlotte, N.C. Demonstrators are protesting before the start of the Democratic National Convention. (AP Photo/Patrick Semansky)

Demonstrators walk during a protest march, Sunday, Sept. 2, 2012, in Charlotte, N.C. Demonstrators are protesting before the start of the Democratic National Convention. (AP Photo/Patrick Semansky)

A band plays during a protest march, Sunday, Sept. 2, 2012, in Charlotte, N.C. Demonstrators are protesting before the start of the Democratic National Convention. (AP Photo/Patrick Semansky)

Demonstrators walk during a protest march, Sunday, Sept. 2, 2012, in Charlotte, N.C. Demonstrators are protesting before the start of the Democratic National Convention. (AP Photo/Chuck Burton)

Police Capt. E.D. Patterson fist bumps with demonstrator Vermin Supreme during a protest march, Sunday, Sept. 2, 2012, in Charlotte, N.C. Demonstrators are protesting before the start of the Democratic National Convention. (AP Photo/Gerry Broome)

Police officers observe protestors marching, Sunday, Sept. 2, 2012, in Charlotte, N.C. Demonstrators are protesting before the start of the Democratic National Convention. (AP Photo/Patrick Semansky)

Demonstrators speak and move toward downtown during a protest march, Sunday, Sept. 2, 2012, in Charlotte, N.C. Demonstrators are protesting before the start of the Democratic National Convention. (AP Photo/Chuck Burton)

Demonstrators sit in an intersection during a protest march, Sunday, Sept. 2, 2012, in Charlotte, N.C. Demonstrators are protesting before the start of the Democratic National Convention. (AP Photo/Patrick Semansky)

Demonstrators move toward downtown during a protest march, Sunday, Sept. 2, 2012, in Charlotte, N.C. Demonstrators are protesting before the start of the Democratic National Convention. (AP Photo/Gerry Broome)

Demonstrators walk during a protest march, Sunday, Sept. 2, 2012, in Charlotte, N.C. Demonstrators are protesting before the start of the Democratic National Convention. (AP Photo/Chuck Burton)

A demonstrator walks with others during a protest march, Sunday, Sept. 2, 2012, in Charlotte, N.C. Demonstrators are protesting before the start of the Democratic National Convention.(AP Photo/Gerry Broome)

Demonstrators march in a Labor Day parade, Monday, Sept. 3, 2012, in Charlotte, N.C. Demonstrators are protesting before the start of the Democratic National Convention. (AP Photo/Patrick Semansky)

Demonstrators march in a Labor Day parade, Monday, Sept. 3, 2012, in Charlotte, N.C. Demonstrators are protesting before the start of the Democratic National Convention. (AP Photo/Chuck Burton)

Demonstrators march in a Labor Day parade, Monday, Sept. 3, 2012, in Charlotte, N.C. Demonstrators are protesting before the start of the Democratic National Convention. (AP Photo/Gerry Broome)

Demonstrators march in a Labor Day parade, Monday, Sept. 3, 2012, in Charlotte, N.C. Demonstrators are protesting before the start of the Democratic National Convention. (AP Photo/Patrick Semansky)

Demonstrators march in a Labor Day parade, Monday, Sept. 3, 2012, in Charlotte, N.C. Demonstrators are protesting before the start of the Democratic National Convention. (AP Photo/Chuck Burton)

Demonstrators march in a Labor Day parade, Monday, Sept. 3, 2012, in Charlotte, N.C. Demonstrators are protesting before the start of the Democratic National Convention. (AP Photo/Patrick Semansky)

Demonstrators march in a Labor Day parade, Monday, Sept. 3, 2012, in Charlotte, N.C. Demonstrators are protesting before the start of the Democratic National Convention. (AP Photo/Gerry Broome)

Demonstrators march in a Labor Day parade, Monday, Sept. 3, 2012, in Charlotte, N.C. Demonstrators are protesting before the start of the Democratic National Convention. (AP Photo/Gerry Broome)

Demonstrators march in a Labor Day parade, Monday, Sept. 3, 2012, in Charlotte, N.C. Demonstrators are protesting before the start of the Democratic National Convention. (AP Photo/Chuck Burton)

Demonstrators march in a Labor Day parade, Monday, Sept. 3, 2012, in Charlotte, N.C. Demonstrators are protesting before the start of the Democratic National Convention. (AP Photo/Chuck Burton)

A vendor sells political buttons, Monday, Sept. 3, 2012, in Charlotte, N.C. Demonstrators are protesting before the start of the Democratic National Convention. (AP Photo/Gerry Broome)

A vendor sells political buttons, Monday, Sept. 3, 2012, in Charlotte, N.C. Demonstrators are protesting before the start of the Democratic National Convention. (AP Photo/Gerry Broome)

Demonstrators march in a Labor Day parade, Monday, Sept. 3, 2012, in Charlotte, N.C. Demonstrators are protesting before the start of the Democratic National Convention. (AP Photo/Gerry Broome)

Street Vendor Mark Evans shows off his hand puppets during Carolina Fest, Monday, Sept. 3, 2012, in Charlotte, N.C., before the Democratic National Convention. (AP Photo/Patrick Semansky)

A woman who gave her name as the Queen of Charlotte speaks to a child Monday, Sept. 3, 2012, in Charlotte, N.C., before the Democratic National Convention. (AP Photo/Gerry Broome)

Small globes line the pathway during Carolina Fest, Monday, Sept. 3, 2012, in Charlotte, N.C., before the Democratic National Convention. (AP Photo/Gerry Broome)

Children are shown an electronic voting machine during Carolina Fest, Monday, Sept. 3, 2012, in Charlotte, N.C., before the Democratic National Convention. (AP Photo/Gerry Broome)

Dr. Steve Frye, of Las Vegas, Nev., sits on a park bench during Carolina Fest Monday, Sept. 3, 2012, in Charlotte, N.C., before the Democratic National Convention. (AP Photo/Gerry Broome)

Police officers ride through an empty Pearl Street Park as nobody showed with the group Raleigh FIST, Fight Imperialism, Stand Together, for a planned protest march, Tuesday, Sept. 4, 2012, in Charlotte, N.C. People are gathering for the Democratic National Convention. (AP Photo/Patrick Semansky)

A placard stands in an empty Pearl Street Park as nobody showed with the group Raleigh FIST, Fight Imperialism, Stand Together, for a planned protest march, Tuesday, Sept. 4, 2012, in Charlotte, N.C. People are gathering for the Democratic National Convention. (AP Photo/Chuck Burton)

A demonstrator known only as the Captain is detained by police during an unscheduled protest march,Tuesday, Sept. 4, 2012, in Charlotte, N.C. The Democratic National Convention begins today. (AP Photo/Patrick Semansky)

A demonstrator known only as the Captain is detained by police during an unscheduled protest march,Tuesday, Sept. 4, 2012, in Charlotte, N.C. The Democratic National Convention begins today. ( (AP Photo/Chuck Burton)

Occupy Demonstrators move in downtown in an unscheduled protest march, Tuesday, Sept. 4, 2012, in Charlotte, N.C. The Democratic National Convention begins today. (AP Photo/Chuck Burton)

Occupy Demonstrators block the camera of a man they believe to be a police officer during an unscheduled protest march, Tuesday, Sept. 4, 2012, in Charlotte, N.C. The Democratic National Convention begins today.(AP Photo/Mike Stewart)

A demonstrator wearing a mask in the likeness of Mitt Romney walks during an unscheduled protest march, Tuesday, Sept. 4, 2012, in Charlotte, N.C. The Democratic National Convention begins today. (AP Photo/Patrick Semansky)

A police officer listens to Occupy demonstrators during an unscheduled protest march, Tuesday, Sept. 4, 2012, in Charlotte, N.C. The Democratic National Convention begins today.(AP Photo/Mike Stewart)

Occupy Demonstrators move in downtown in an unscheduled protest march, Tuesday, Sept. 4, 2012, in Charlotte, N.C. The Democratic National Convention begins today. (AP Photo/Chuck Burton)

Occupy Demonstrators shout at police during an unscheduled protest march, Tuesday, Sept. 4, 2012, in Charlotte, N.C. The Democratic National Convention begins today. (AP Photo/Patrick Semansky)

An Occupy demonstrator wearing a Guy Fawkes mask takes a photo of others on a protest march, Tuesday, Sept. 4, 2012, in Charlotte, N.C. The Democratic National Convention begins today. (AP Photo/Patrick Semansky)

Occupy Demonstrators shout at police during an unscheduled protest march, Tuesday, Sept. 4, 2012, in Charlotte, N.C. The Democratic National Convention begins today. (AP Photo/Mike Stewart)

Occupy Demonstrators move through downtown in an unscheduled protest march, Tuesday, Sept. 4, 2012, in Charlotte, N.C. The Democratic National Convention begins today. (AP Photo/Patrick Semansky)

Occupy Demonstrators speak to police in downtown during an unscheduled protest march, Tuesday, Sept. 4, 2012, in Charlotte, N.C. The Democratic National Convention begins today. (AP Photo/Mike Stewart)

Occupy Demonstrators with masks in the likeness of President Barack Obama and Mitt Romney embrace as they move through downtown in an unscheduled protest march, Tuesday, Sept. 4, 2012, in Charlotte, N.C. The Democratic National Convention begins today. AP Photo/Chuck Burton)

Occupy Demonstrators shout at police during a downtown unscheduled protest march, Tuesday, Sept. 4, 2012, in Charlotte, N.C. The Democratic National Convention begins today. (AP Photo/Chuck Burton)

Occupy Demonstrators move through downtown in an unscheduled protest march, Tuesday, Sept. 4, 2012, in Charlotte, N.C. The Democratic National Convention begins today. (AP Photo/Chuck Burton)

An Occupy demonstrator wearing a Guy Fawkes mask sits with other demonstrators during a protest march and sit-in, Tuesday, Sept. 4, 2012, in Charlotte, N.C. The Democratic National Convention begins today. (AP Photo/Patrick Semansky)

Occupy Demonstrators are surrounded by the media and police during an unscheduled protest march, Tuesday, Sept. 4, 2012, in Charlotte, N.C. The Democratic National Convention begins today. (AP Photo/Patrick Semansky)

Occupy Demonstrators chant during an unscheduled protest march, Tuesday, Sept. 4, 2012, in Charlotte, N.C. The Democratic National Convention begins today. (AP Photo/Patrick Semansky)

Occupy Demonstrators shout at police during an unscheduled protest march, Tuesday, Sept. 4, 2012, in Charlotte, N.C. The Democratic National Convention begins today. (AP Photo/Patrick Semansky)

An Occupy Demonstrator stands near police during an unscheduled protest march, Tuesday, Sept. 4, 2012, in Charlotte, N.C. The Democratic National Convention begins today. (AP Photo/Chuck Burton)

Occupy Demonstrators and police stand in a downtown street during an unscheduled protest march, Tuesday, Sept. 4, 2012, in Charlotte, N.C. The Democratic National Convention begins today. (AP Photo/Chuck Burton)

Occupy Demonstrators and police stand in a downtown street during an unscheduled protest march, Tuesday, Sept. 4, 2012, in Charlotte, N.C. The Democratic National Convention begins today. (AP Photo/Chuck Burton)

Occupy Demonstrators shout at police during an unscheduled protest march, Tuesday, Sept. 4, 2012, in Charlotte, N.C. The Democratic National Convention begins today. (AP Photo/Chuck Burton)

An Occupy demonstrator wearing a Guy Fawkes mask moves through downtown in an unscheduled protest march, Tuesday, Sept. 4, 2012, in Charlotte, N.C. The Democratic National Convention begins today. (AP Photo/Patrick Semansky)

Chief of the Charlotte-Mecklenburg Police Department Rodney D. Monroe, center speaks with a demonstrator as Police officer Mark Newbold, right, looks on, Tuesday, Sept. 4, 2012, in Charlotte, N.C. The Democratic National Convention begins today. (AP Photo/Chuck Burton)

Occupy Demonstrators move through downtown in an unscheduled protest march, Tuesday, Sept. 4, 2012, in Charlotte, N.C. The Democratic National Convention begins today. (AP Photo/Patrick Semansky)

An Occupy Demonstrator blows bubbles near a police line as others move through downtown in an unscheduled protest march, Tuesday, Sept. 4, 2012, in Charlotte, N.C. The Democratic National Convention begins today. (AP Photo/Patrick Semansky)

Occupy Demonstrators move through downtown in an unscheduled protest march, Tuesday, Sept. 4, 2012, in Charlotte, N.C. The Democratic National Convention begins today. (AP Photo/Patrick Semansky)

An Occupy Demonstrator speaks to a police officer as others move through downtown in an unscheduled protest march, Tuesday, Sept. 4, 2012, in Charlotte, N.C. The Democratic National Convention begins today. (AP Photo/Patrick Semansky)

Occupy Demonstrators march in downtown during an unscheduled protest march, Tuesday, Sept. 4, 2012, in Charlotte, N.C. The Democratic National Convention begins today. (AP Photo/Chuck Burton)

An Occupy Demonstrator takes a photo with his mask during an unscheduled protest march, Tuesday, Sept. 4, 2012, in Charlotte, N.C. The Democratic National Convention begins today. (AP Photo/Chuck Burton)

A Guy Fawkes mask lies in a tent in the Occupy encampment, Tuesday, Sept. 4, 2012, in Charlotte, N.C. The Democratic National Convention begins today. (AP Photo/Patrick Semansky)

Occupy Demonstrators dance on the sidewalk during an unscheduled protest march, Tuesday, Sept. 4, 2012, in Charlotte, N.C. The Democratic National Convention begins today. (AP Photo/Patrick Semansky)

Tuesday, Sept. 4, 2012, in Charlotte, N.C. the Democratic National Convention. The Democratic National Convention begins today. (AP Photo/Chuck Burton)

Occupy Demonstrators speak during an unscheduled protest march, Tuesday, Sept. 4, 2012, in Charlotte, N.C. The Democratic National Convention begins today. (AP Photo/Chuck Burton)

Chris Kite with the Community Singers speaks with one person listening, in the "Free Speech Area," Tuesday, Sept. 4, 2012, in Charlotte, N.C. The zone will be open during the Democratic National Convention. (AP Photo/Mike Stewart)

James Ian Tyson, of Charlotte, speaks to an Associated Press reporter, Tuesday, Sept. 4, 2012, in Charlotte, N.C. Tyson says he discovered he was on a terrorist watch list after he was arrested by Charlotte police on a routine traffic violation. He believes he was targeted by police to stop him from organizing protesters during this week's Democratic National Convention in Charlotte. (AP Photo/Chuck Burton)

James Ian Tyson, of Charlotte, speaks to an Associated Press reporter, Tuesday, Sept. 4, 2012, in Charlotte, N.C. Tyson says he discovered he was on a terrorist watch list after he was arrested by Charlotte police on a routine traffic violation. He believes he was targeted by police to stop him from organizing protesters during this week's Democratic National Convention in Charlotte. (AP Photo/Chuck Burton)

Occupy Demonstrators use a tarp to push against a police barricade during an unscheduled protest march, Tuesday, Sept. 4, 2012, in Charlotte, N.C. The Democratic National Convention begins today. (AP Photo/Gerry Broome)

Occupy Demonstrators use a tarp to push against a police barricade during an unscheduled protest march, Tuesday, Sept. 4, 2012, in Charlotte, N.C. The Democratic National Convention begins today.(AP Photo/Gerry Broome)

Occupy Demonstrators use a tarp to push against a police barricade during an unscheduled protest march, Tuesday, Sept. 4, 2012, in Charlotte, N.C. The Democratic National Convention begins today. (AP Photo/Patrick Semansky)

Occupy Demonstrators chant as a police officer holds the line after demonstrators used a tarp to push against a police barricade during an unscheduled protest march, Tuesday, Sept. 4, 2012, in Charlotte, N.C. The Democratic National Convention begins today. (AP Photo/Patrick Semansky)

Occupy Demonstrators use a tarp to push against a police barricade during an unscheduled protest march, Tuesday, Sept. 4, 2012, in Charlotte, N.C. The Democratic National Convention begins today. (AP Photo/Patrick Semansky)

Occupy Demonstrators speak to police after the demonstrators used a tarp to push against a police barricade during an unscheduled protest march, Tuesday, Sept. 4, 2012, in Charlotte, N.C. The Democratic National Convention begins today. (AP Photo/Patrick Semansky)

Clayton County (Ga.) Sheriff's Deputy John Strutko dances as he directs traffic Wednesday, Sept. 5, 2012, in Charlotte, N.C., during the second day of the Democratic National Convention. (AP Photo/Mike Stewart)

Clayton County (Ga.) Sheriff Capt. Samuel Smith reacts to a spectators comments after he danced while directing traffic, Wednesday, Sept. 5, 2012, in Charlotte, N.C., during the second day of the Democratic National Convention. (AP Photo/Mike Stewart)

Clayton County (Ga.) Sheriff Capt. Samuel Smith dances as he directs traffic, Wednesday, Sept. 5, 2012, in Charlotte, N.C., during the second day of the Democratic National Convention. (AP Photo/Mike Stewart)

Clayton County (Ga.) Sheriff Capt. Samuel Smith dances as he directs traffic, Wednesday, Sept. 5, 2012, in Charlotte, N.C., during the second day of the Democratic National Convention. (AP Photo/Mike Stewart)

Clayton County (Ga.) Sheriff Capt. Samuel Smith reacts to a spectators comments after he danced while directing traffic, Wednesday, Sept. 5, 2012, in Charlotte, N.C., during the second day of the Democratic National Convention. (AP Photo/Mike Stewart)

Clayton County (Ga.) Sheriff Capt. Samuel Smith dances as he directs foot traffic, Wednesday, Sept. 5, 2012, in Charlotte, N.C., during the second day of the Democratic National Convention. (AP Photo/Mike Stewart)

Atlanta Mayor Kasim Reed, left, moderates a discussion during a town-hall style meeting, Wednesday, Sept. 5, 2012, in Charlotte, N.C., during the second day of the Democratic National Convention. (AP Photo/Patrick Semansky)

Atlanta Mayor Kasim Reed, moderates a discussion during a town-hall style meeting, Wednesday, Sept. 5, 2012, in Charlotte, N.C., during the second day of the Democratic National Convention. (AP Photo/Patrick Semansky)

Chelsea Clinton moderates a town-hall style meeting called "Conversations With the Next Generation," Wednesday, Sept. 5, 2012, in Charlotte, N.C., during the second day of the Democratic National Convention. (AP Photo/Patrick Semansky)

Code Pink demonstrators chant outside the Charlotte Convention Center during a protest march, Wednesday, Sept. 5, 2012, in Charlotte, N.C., during the second day of the Democratic National Convention.(AP Photo/Gerry Broome)

A Code Pink demonstrator chants outside the Charlotte Convention Center during a protest march, Wednesday, Sept. 5, 2012, in Charlotte, N.C., during the second day of the Democratic National Convention. (AP Photo/Gerry Broome)

Demonstrator Larry Miller, of Carrabelle, Fla., participates in a protest march, Wednesday, Sept. 5, 2012, in Charlotte, N.C., during the second day of the Democratic National Convention. (AP Photo/Gerry Broome)

Occupy demonstrators wave a flag near the Charlotte Convention Center during a protest march, Wednesday, Sept. 5, 2012, in Charlotte, N.C., during the second day of the Democratic National Convention. (AP Photo/Gerry Broome)

Clayton County (Ga.) Sheriff's Deputy John Strutko dances as he directs traffic Wednesday, Sept. 5, 2012, in Charlotte, N.C., during the second day of the Democratic National Convention. (AP Photo/Mike Stewart)

Demonstrators walk down a downtown street during a protest march, Wednesday, Sept. 5, 2012, in Charlotte, N.C., during the second day of the Democratic National Convention. (AP Photo/Patrick Semansky)

A demonstrator shouts at police during a protest march, Wednesday, Sept. 5, 2012, in Charlotte, N.C., during the second day of the Democratic National Convention. (AP Photo/Patrick Semansky)

A demonstrator shouts at police during a protest march, Wednesday, Sept. 5, 2012, in Charlotte, N.C., during the second day of the Democratic National Convention. (AP Photo/Patrick Semansky)

An Occupy demonstrator stands with police during a protest march, Wednesday, Sept. 5, 2012, in Charlotte, N.C., during the second day of the Democratic National Convention. (AP Photo/Gerry Broome)

Spectators photograph a Clayton County (Ga.) Sheriff's deputy dancing as he directs traffic, Wednesday, Sept. 5, 2012, in Charlotte, N.C., during the second day of the Democratic National Convention. (AP Photo/Mike Stewart)

Clayton County (Ga.) Sheriff Capt. Samuel Smith dances as he directs foot traffic, Wednesday, Sept. 5, 2012, in Charlotte, N.C., during the second day of the Democratic National Convention. (AP Photo/Mike Stewart)

Chelsea Clinton moderates a town-hall style meeting called "Conversations With the Next Generation," as MTV's Andrew Jenks listens, Wednesday, Sept. 5, 2012, in Charlotte, N.C., during the second day of the Democratic National Convention. (AP Photo/Patrick Semansky)

A security official speaks to convention goers as they were asked to move outside a security zone, Wednesday, Sept. 5, 2012, in Charlotte, N.C., during the second day of the Democratic National Convention.The entrance was delayed because of safety concerns. (AP Photo/Chuck Burton)

A security official speaks to a convention goer as he was asked to move outside a security zone, Wednesday, Sept. 5, 2012, in Charlotte, N.C., during the second day of the Democratic National Convention.The entrance was delayed because of safety concerns. (AP Photo/Chuck Burton)

A security official speaks to convention goers as they were asked to move outside a security zone, Wednesday, Sept. 5, 2012, in Charlotte, N.C., during the second day of the Democratic National Convention.The entrance was delayed because of safety concerns. (AP Photo/Chuck Burton)

Occupy Demonstrators march at night, Wednesday, Sept. 5, 2012, in Charlotte, N.C., during the second day of the Democratic National Convention. (AP Photo/Gerry Broome)

Occupy Demonstrators march at night, Wednesday, Sept. 5, 2012, in Charlotte, N.C., during the second day of the Democratic National Convention. (AP Photo/Gerry Broome)

Wednesday, Sept. 5, 2012, in Charlotte, N.C., during the second day of the Democratic National Convention. (AP Photo/Patrick Semansky)

Occupy Demonstrators march at night, Wednesday, Sept. 5, 2012, in Charlotte, N.C., during the second day of the Democratic National Convention. (AP Photo/Patrick Semansky)

Occupy Demonstrators march at night, Wednesday, Sept. 5, 2012, in Charlotte, N.C., during the second day of the Democratic National Convention. (AP Photo/Gerry Broome)

Occupy Demonstrators march at night, Wednesday, Sept. 5, 2012, in Charlotte, N.C., during the second day of the Democratic National Convention. (AP Photo/Gerry Broome)

ADDS INFORMATION ON SITUATION DEPEICTED --Demonstrators shout as they confront a police line Wednesday, Sept. 5, 2012, in Charlotte, N.C., during the second day of the Democratic National Convention. (AP Photo/Patrick Semansky)

Signage is seen near downtown announcing that the convention event that was to take place in the stadium was cancelled, Thursday, Sept. 6, 2012, in Charlotte, N.C., during the last day of the Democratic National Convention. The convention will continue inside Time Warner Cable Arena. (AP Photo/Gerry Broome)

A demonstrator shouts at police during an evening protest march, Wednesday, Sept. 5, 2012, in Charlotte, N.C., during the second day of the Democratic National Convention. (AP Photo/Patrick Semansky)

Environmental demonstrators hold a sit-in and are detained near the headquarters of Duke Energy, Thursday, Sept. 6, 2012, in Charlotte, N.C., during the last day of the Democratic National Convention. Six people were detained. (AP Photo/Mike Stewart)

Environmental demonstrators hold a sit-in and are detained near the headquarters of Duke Energy, Thursday, Sept. 6, 2012, in Charlotte, N.C., during the last day of the Democratic National Convention. Six people were detained. (AP Photo/Jeffrey Collins)

Environmental demonstrators hold a sit-in and are detained near the headquarters of Duke Energy, Thursday, Sept. 6, 2012, in Charlotte, N.C., during the last day of the Democratic National Convention. Six people were detained. (AP Photo/Michael Biesecker)

Rev. Benham, right, of North Carolina, and an Occupy demonstrator have a heated verbal exchange about women's reproductive rights outside the convention center, Thursday, Sept. 6, 2012, in Charlotte, N.C., during the last day of the Democratic National Convention. (AP Photo/Chuck Burton)

Environmental demonstrators hold a sit-in near the headquarters of Duke Energy, Thursday, Sept. 6, 2012, in Charlotte, N.C., during the last day of the Democratic National Convention. Six people were detained. (AP Photo/Chuck Burton)

Environmental demonstrators hold a sit-in and are detained near the headquarters of Duke Energy, Thursday, Sept. 6, 2012, in Charlotte, N.C., during the last day of the Democratic National Convention. Six people were detained. (AP Photo/Chuck Burton)

Rev. Benham, right, of North Carolina, and an Occupy demonstrator have a heated verbal exchange about women's reproductive rights outside the convention center, Thursday, Sept. 6, 2012, in Charlotte, N.C., during the last day of the Democratic National Convention. (AP Photo/Chuck Burton)

Rev. Benham, left, of North Carolina, and an Occupy demonstrator have a heated verbal exchange about women's reproductive rights outside the convention center, Thursday, Sept. 6, 2012, in Charlotte, N.C., during the last day of the Democratic National Convention. (AP Photo/Mike Stewart)

Rev. Benham, left, of North Carolina, and an Occupy demonstrator have a heated verbal exchange about women's reproductive rights outside the convention center, Thursday, Sept. 6, 2012, in Charlotte, N.C., during the last day of the Democratic National Convention. (AP Photo/Chuck Burton)

Mark Apollo and Katrina Corbell kiss in the Occupy Protest campground, Tuesday, Sept. 4, 2012, in Charlotte, N.C. (AP Photo/Chuck Burton)

A church member, right, of North Carolina, and an Occupy demonstrator have a heated verbal exchange about women's reproductive rights outside the convention center, Thursday, Sept. 6, 2012, in Charlotte, N.C., during the last day of the Democratic National Convention. (AP Photo/Chuck Burton)

An Occupy protestor marches Thursday, Sept. 6, 2012, in Charlotte, N.C., during the last day of the Democratic National Convention. (AP Photo/Gerry Broome)

A couple wearing masks in the likeness of President Obama and first lady Michelle Obama cross a downtown street, Thursday, Sept. 6, 2012, in Charlotte, N.C., during the last day of the Democratic National Convention. (AP Photo/Chuck Burton)

A spectator takes photos of Occupy demonstrators marching in protest, Thursday, Sept. 6, 2012, in Charlotte, N.C., during the last day of the Democratic National Convention. (AP Photo/Gerry Broome)

Occupy protestors moves near the Charlotte Convention Center during a protest march, Thursday, Sept. 6, 2012, in Charlotte, N.C., during the last day of the Democratic National Convention. (AP Photo/Mike Stewart)

Authorities prepare to enter the office of Nashville District Attorney General Torry Johnson's office, Tuesday, Sept. 11, 2012, in Nashville, Tenn. Authorities said that the office had received a threatening letter and a white powder came out of the envelope. (AP Photo/Rob Gillies)

Authorities prepare to enter the office of Nashville District Attorney General Torry Johnson's office, Tuesday, Sept. 11, 2012, in Nashville, Tenn. Authorities said that the office had received a threatening letter and a white powder came out of the envelope. (AP Photo/Rob Gillies)

Authorities arrive to the office of Nashville District Attorney General Torry Johnson's office, Tuesday, Sept. 11, 2012, in Nashville, Tenn. Authorities said that the office had received a threatening letter and a white powder came out of the envelope. (AP Photo/Rob Gillies)