U.S. President Obama visits FBI headquarters in Washington

U.S. President Barack Obama (R) meets with Robert Mueller (C), director of the Federal Bureau of Investigation (FBI), and John Pistole, deputy director of the FBI, at FBI headquarters in Washington on April 28, 2009. Obama told FBI employees today that confronting the threat of terrorism means the U.S. must adopt new tactics while still upholding its ideals. (UPI Photo/Brendan Smialowski/Pool)