U.S. President Barack Obama receives a cap during his visit to FBI headquarters in Washington

 
U.S. President Barack Obama receives a cap during his visit to FBI headquarters in Washington
U.S. President Barack Obama tries to figure out how to adjust a cap given to him by FBI director Robert Mueller during his visit to FBI headquarters in Washington April 28, 2009. REUTERS/Kevin Lamarque (UNITED STATES POLITICS IMAGES OF THE DAY)