As Sunday marks the 15th anniversary of the 9/11 terrorist attacks, the NFL will commemorate the day with several on-field markers of the occasion.
Among the most visible markers will be decals worn on the helmets of every player, as well as 9/11 lapel pins worn by all the coaches.
President Barack Obama and former President George W. Bush have both taped video messages for NFL Films that will be shown before games. A message from Obama will be shown before the early afternoon games a message from Bush will be shown before the late afternoon games, and both presidents will be shown before the Sunday night game.
Special guests including first responders and members of the military will be at every game, including Vice President Joe Biden at the Browns-Eagles game in Philadelphia, and Bush and Laura Bush at the Giants-Cowboys game in Dallas.