Fans cheer in front of a banner honoring the attacks on 9-11 during the first half of an NFL football game between the Baltimore Ravens and the Pittsburgh Steelers, on Thursday, Sept. 11, 2014, in Baltimore.

U.S. Army Sgt. Joe Wilson, from Pittsburgh, wears a flag on his hat before an NFL football game between the Baltimore Ravens and the Pittsburgh Steelers on Thursday, Sept. 11, 2014, in Baltimore. (AP Photo/Patrick Semansky)

A field size American Flag on the field for the National Anthem prior to the first half of an NFL football game between the Philadelphia Eagles and the Jacksonville Jaguars, Sunday, Sept. 7, 2014, in Philadelphia. (AP Photo/Chris Szagola)

An American Flag covers the field below the new scoreboard before the Jacksonville Jaguars play against Atlanta Falcons August 28, 2014 at Everbank Field in Jacksonville, Florida. The Falcons defeated the Jaguars 24 - 14 in the fourth week of the preseason. (AP Photo / Al Messerschmidt)

Tampa Bay Buccaneers guard Jamon Meredith (79) carries an American flag onto the field during player introductions prior to an NFL football game against the Buffalo Bills in Tampa, Fla., Sunday, Dec. 8, 2013. (AP Photo/Phelan M. Ebenhack)

Dallas Cowboys safety George Teague, (31), carries an American flag onto the playing field at Texas Stadium in Irving, Texas, Sunday, Sept. 23, 2001 before kickoff with the San Diego Chargers. (AP Photo/Tim Sharp)

A Jets fan sports a United States flag painted face while holding the US flag during a pregame tribute to the policemen, firemen, and others who died in the 9/11 attack on the World Trade Center and Pentagon during the San Francisco 49ers game against the New York Jets at Giants Stadium on October 1, 2001 in East Rutherford, New Jersey. The 49ers defeated the Jets 19-17. (AP Photo/Paul Spinelli)

A giant American flag is displayed on the field during the national anthem in commemoration of the victims of Sept. 11 before the game between the Miami Dolphins and the Denver Broncos Sunday, Sept. 11, 2005 in Miami. (AP Photo/Luis M. Alvarez)

Fans attending the Washington Redskins football game against the Minnesota Vikings wave American flags in a ceremony commemorating the Sept. 11, 2001 terrorist attacks prior to the start of the game, Monday, Sept. 11, 2006, in Landover, Md.(AP Photo/Lawrence Jackson)

New York Giants defensive end Justin Tuck (91) gets fired up as he comes onto the field wearing a Fire Department of NY helmet in honor of those lost on 9-11-01 during pregame player introductions at the NFL regular season week 1 football game against the Carolina Panthers on Sunday, September 12, 2010 in East Rutherford, New Jersey. The Giants won the game 31-18. (AP Photo/Paul Spinelli)

The ceremonial 9-11 flag is displayed during the national anthem before an NFL football game of the Dallas Cowboys against the New York Giants, Monday, October 25, 2010 at Cowboys Stadium in Arlington, Texas. The Giants won the game, 41-35. (AP Photo/James D Smith)

Shoes in honor of 9/11 wait in a Dallas Cowboys locker before an NFL football game against the New York Jets Sunday, September 11, 2011 at MetLife Stadium in East Rutherford, New Jersey. The Jets won the game, 27-24. (AP Photo/James D Smith)

An American flag is held on the field before an NFL football game in between the Baltimore Ravens and the Pittsburgh Steelers Baltimore, Sunday, Sept. 11, 2011. The flag was presented to honor the tenth anniversary of the Sept. 11, 2001, terrorist attacks. (AP Photo/Nick Wass)

A painting on the field honoring the 10th anniversary of the Sept. 11 attacks is shown asTampa Bay Buccaneers and Detroit Lions players warm up before an NFL football game Sunday, Sept. 11, 2011, in Tampa, Fla. (AP Photo/Chris O'Meara)

Cleveland Browns quarterback Colt McCoy, center, along with other members of the Browns, fire department and armed services hold a United States flag during the national anthem before an NFL football game against the Cincinnati Bengals, Sunday, Sept. 11, 2011, in Cleveland. (AP Photo/Tony Dejak)

Referee Don Carey holds a ceremonial game ball on the 10th anniversary of the Sept. 11 attacks before an NFL football game between the Chicago Bears and the Atlanta Falcons in Chicago, Sunday, Sept. 11, 2011. (AP Photo/Charles Rex Arbogast)

Cleveland Browns tight end Benjamin Watson runs onto the field holding an American flag before an NFL football game against the Cincinnati Bengals Sunday, Sept. 11, 2011, in Cleveland. (AP Photo/Mark Duncan)

Shoes in honor of 9/11 wait in a Dallas Cowboys locker before an NFL football game against the New York Jets Sunday, September 11, 2011 at MetLife Stadium in East Rutherford, New Jersey. The Jets won the game, 27-24. (AP Photo/James D Smith)

A giant American flag is held by first responders, police officers and firefighters before an NFL football game between the Chicago Bears and Atlanta Falcons, Sunday, Sept. 11, 2011, in Chicago. The day marks the 10th anniversary of the 9/11 attacks. (AP Photo/Nam Y. Huh)

Fans cheer during a ceremony in commemoration of the 10th anniversary of the 9/11 terrorist attacks before an NFL football game between the Jacksonville Jaguars and the Tennessee Titans, Sunday, Sept. 11, 2011, in Jacksonville, Fla. (AP Photo/Stephen Morton)

Tennessee Titans quarterback Matt Hasselbeck, left, wears shoes made to look like the American flag prior to an NFL football game against the Jacksonville Jaguars in Jacksonville, Fla., Sunday, Sept. 11, 2011.(AP Photo/PHELAN EBENHACK)

A giant American flag covers the field in honor of the 10th anniversary of 9/11 before an NFL football game between the New York Giants and the Washington Redskins, Sunday, Sept. 11, 2011, in Landover, Md. (AP Photo/Cliff Owen)

A fan holds up an American flag before an NFL football game between the San Francisco 49ers and the Seattle Seahawks in San Francisco, Sunday, Sept. 11, 2011. (AP Photo/Marcio Jose Sanchez)

A fan stands near a September 11 memorial flag as he waits for the start an NFL football game between the Dallas Cowboys and the New York Jets Sunday, Sept. 11, 2011, in East Rutherford, N.J. (AP Photo/Henny Ray Abrams)

New York Jets quarterback Mark Sanchez (6) runs onto the field carrying an American flag before an NFL football game between the Dallas Cowboys and New York Jets on Sunday, Sept. 11, 2011, in East Rutherford, N.J. (AP Photo/Henny Ray Abrams)