U.S. President Barack Obama shares a laugh with Buddy Ryan, the Defensive Co-Ordinator of the 1985 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)