Port Authority of New York and New Jersey police officer Kameel Juman holds up a Chris Christie sign Tuesday, Jan. 22, 2013, in Elizabeth, N.J., as Christie picks up an endorsement from the union representing police at the Port Authority of New York and New Jersey, a group that backed Democrat Jon Corzine four years ago. Christie told the cheering throng at the Newark Airport Hilton that he will continue to support Port Authority police in their dispute with the New York City police department over who will provide security at the former World Trade Center site. (AP Photo/Mel Evans)