FILE - This May 24, 2013, file photo shows the empty Delta airlines terminal 3 at JFK airport in New York. The National Trust for Historic Preservation put the Worldport Terminal on the 2013 list of Endangered Historic Place. The unique flying-saucer-shaped Worldport Terminal built by Pan Am in 1960 at New York’s Kennedy Airport was a symbol of the jet age. (AP Photo/Mary Altaffer, File)