Spectators wait for a fireworks display to begin at a Fourth of July celebration in Kansas City, Kan. Tuesday, July 3, 2012. (AP Photo/Charlie Riedel)

Republican presidential candidate, former Massachusetts Gov. Mitt Romney buys lemonade as he participates in the Fourth of July Parade in Wolfeboro, N.H., Wednesday, July 4, 2012. (AP Photo/Charles Dharapak)

Spectators watch fireworks streak across the sky during the Fanfare and Fireworks celebration at the University of Florida on Tuesday, July 3, 2012, in Gainesville, Fla. (AP Photo/The Gainesville Sun, Matt Stamey)

Fourth of July fireworks are set off on Lake Winnipesaukee, Tuesday, July 3, 2012 in Alton Bay, N.H. (AP Photo/Jim Cole)

A United States flag waves next to carnival rides as fireworks burst in the air during the Fourth of July Independence Day show at State Fair Meadowlands, Tuesday, July 3, 2012, in East Rutherford, N.J. (AP Photo/Julio Cortez)

Fireworks light up the sky against the backdrop of a full moon during a Fourth of July celebration in Kansas City, Kan., Tuesday, July 3, 2012. (AP Photo/Charlie Riedel)

Banners with the United States flag colors wave as fireworks burst in the air during the Fourth of July Independence Day show at State Fair Meadowlands, Tuesday, July 3, 2012, in East Rutherford, N.J. (AP Photo/Julio Cortez)

Fourth of July fireworks are set off on Lake Winnipesaukee, Tuesday, July 3, 2012 in Alton Bay, N.H. (AP Photo/Jim Cole)

A United States flag flies over a field during the Fanfare and Fireworks celebration at the University of Florida on Tuesday, July 3, 2012, in Gainesville, Fla. (AP Photo/The Gainesville Sun, Matt Stamey)

Sheila Grimes of South Berwick, Maine looks through piles of fireworks at Hilltop Fireworks, Tuesday, July 3, 2012 in Somersworth, N.H. The conventional wisdom is that Maine’s new law legalizing consumer fireworks will hurt New Hampshire fireworks stores because Mainers won’t have to travel to buy their missiles, Roman candles and exploding aerial displays. But the owners of Hilltop Fireworks in Somersworth, N.H., along the southern Maine border, say they’ve had more Maine customers in the days leading up to the Fourth of the July than in previous years.(AP Photo/Jim Cole)

Gabi Hogg, 7, and her mother Jenny Hogg share a moment before mounting a bike for the July Fourth Parade on Highway 77 in Panama City, Fla. Wednesday July 4, 2012. (AP Photo/The News Herald, Andrew P Johnson)

Nicolas D'Annunzio, 4, left, and Ian Strother, 5, join the parade of bikes, wagons and scooters decorated for the annual Riverside Citizens Association 4th of July Pancake Breakfast and Children's Parade in Central Riverside Park in Wichita, Kan., Wednesday, July 4, 2012. (AP Photo/The Wichita Eagle, Mike Hutmacher) MAGS OUT AND TV OUT

Steve Zeender of Towson, Md. leaves his home with gasoline cans to refill for his power generator Wednesday, July 4, 2012. He is among hundreds of thousands from the Midwest to the Mid-Atlantic who are spending their Fourth of July like America's founders, without electricity in their homes. (AP Photo/Steve Ruark)

Tim "Eater X" Janus, left, and five-time reigning champion Joey Chestnut, right, compete in the Nathan's Famous Hot Dog Eating World Championship, Wednesday, July 4, 2012, in the Brooklyn borough of New York. Chestnut won his sixth straight Coney Island hot dog eating contest. (AP Photo/John Minchillo)

Cousins Reggie Moretz, left, and Conan Tapia, both 3, entertain themselves with flags as they await the start of the Fourth of July Kiddie Parade from inside the "USS Lady Liberty" on Tuesday, July 3, 2012, on the Sherman Avenue parade route in Coeur d'Alene, Idaho. (AP Photo/Coeur d'Alene Press, Jerome A. Pollos) MANDATORY CREDIT

From left, Harper Yondura and Jason Yondura, participate in the Port Carbon Citizens Committee's annual Fourth of July Parade nicknamed the "Baby Parade" in Port Carbon, Pa. Wednesday, July 4, 2012. (AP Photo/Republican-Herald, Jacqueline Dormer)

Harper Yondura participates in the Port Carbon Citizens Committee's annual Fourth of July Parade nicknamed the "Baby Parade" in Port Carbon, Pa. Wednesday, July 4, 2012. (AP Photo/Republican-Herald, Jacqueline Dormer)

Brianna Honis participates in the Port Carbon Citizens Committee's annual Fourth of July Parade nicknamed the "Baby Parade" in Port Carbon, Pa. Wednesday, July 4, 2012. (AP Photo/Republican-Herald, Jacqueline Dormer)

Linda Fees and daughter Emily Fees, honor the firefighters, victims, and military of 911 during the Port Carbon Citizens Committee's annual Fourth of July Parade nicknamed the "Baby Parade" in Port Carbon, Pa. Wednesday, July 4, 2012. (AP Photo/Republican-Herald, Jacqueline Dormer)

Brianna Honish, Saint Clair, Pa., decked out in patriotic peace sunglasses waits for the start of the Port Carbon Citizens Committee's annual Fourth of July Parade nicknamed the "Baby Parade" in Port Carbon, Pa. Wednesday, July 4, 2012. (AP Photo/Republican-Herald, Jacqueline Dormer)

Vietnam veteran Tom Heitman holds the American flag in the front of the line before the Fourth of July parade along main street in West Bend on Wednesday, July 4, 2012. Heitman, a Vietnam vet, served from 1968-72. (AP Photo/The Daily News, John Ehlke)

Margaret White, 5, waves from her porch as floats and marchers assemble for the start of the annual Fourth of July parade Wednesday, July 4, 2012 in Sausalito, Calif. (AP Photo/Eric Risberg)

Fireworks light up the sky during the annual Macy's Fourth of July fireworks display over the Hudson River as seen from New York, Wednesday, July 4, 2012. (AP Photo/Jeffrey Furticella)

Fireworks light the sky over the U.S. Capitol, left, Washington Monument and Lincoln Memorial in Washington on Wednesday, July 4, 2012, as seen from Arlington, Va. (AP Photo/Alex Brandon)

The Empire State Building, illuminated with red, white and blue lights, is seen from the Queens borough of New York, backlit by fireworks lighting up the sky over the Hudson River, during the Macy's Fourth of July fireworks show Wednesday, July 4, 2012, in New York. (AP Photo/Frank Franklin II)

Spectators watch as fireworks light up the sky over the Hudson River during the Macy's Fourth of July fireworks show Wednesday, July 4, 2012, in New York. (AP Photo/John Minchillo)

Trains run through Hudson Yard in New York as fireworks light up the sky over the Hudson River during the Macy's Fourth of July fireworks show Wednesday, July 4, 2012. (AP Photo/CX Matiash)