U.S. President Barack Obama walks on stage with the 1985 Chicago Bears Defensive Co-Ordinator Buddy Ryan (L) and Head Coach Mike Ditka, as Obama honors the Super Bowl-winning Chicago Bears NFL team on the South Lawn of the White House in Washington, October 7, 2011. In 1986, the team’s White House reception was cancelled due to the Space Shuttle Challenger tragedy. REUTERS/Jason Reed (UNITED STATES – Tags: POLITICS SPORT FOOTBALL)