A Marine helps hold a U.S. flag during the pregame ceremonies before a game between the Philadelphia Eagles and the Dallas Cowboys in Philadelphia. (AP Photo/Michael Perez)

New England Patriots running back Stevan Ridley celebrates after his touchdown against the Buffalo Bills. (AP Photo/Elise Amendola)

Oakland Raiders cornerback Michael Huff breaks up a pass intended for Baltimore Ravens wide receiver Torrey Smith. (AP Photo/Nick Wass)

Tampa Bay Buccaneers cornerback Leonard Johnson runs back an interception for a touchdown against the San Diego Chargers. (Kim Klement/US Presswire)

St. Louis Rams wide receiver Danny Amendola carries the ball past San Francisco 49ers cornerback Carlos Rogers (22) and free safety Dashon Goldson. (AP Photo/Marcio Jose Sanchez)

New Orleans Saints running back Chris Ivory stiff arms Atlanta Falcons cornerback Dunta Robinson on a touchdown run. (AP Photo/Bill Haber)

Philadelphia Eagles wide receiver Riley Cooper celebrates after pulling in a touchdown pass against the Dallas Cowboys. (AP Photo/Michael Perez)

Carolina Panthers quarterback Cam Newton is hit by Denver Broncos defensive end Derek Wolfe (95) and defensive end Robert Ayers as he throws a pass. (Bob Donnan/US Presswire)

A plane flies over Paul Brown Stadium during the national anthem prior to the game against the New York Giants. (Andrew Weber/US Presswire)

New England Patriots tight end Rob Gronkowski catches a touchdown pass while being defended by Buffalo Bills defensive end Kyle Moore. (Stew Milne/US Presswire)