AT THE PENTAGON A memorial flag and lights illuminate the spot where American Airlines Flight 77 crashed into the Pentagon on Sept. 11, 2001. Department of Defense leaders took part in the 2nd Annual Freedom Walk from the National Mall in Washington D.C. to the Pentagon to commemorate the 5th anniversary of the attacks on the U.S. and the 2,973 people who lost their lives. SHARE IMAGE: Download Image: Full Size (0.06 MB) Photo By: VIRIN: 248970-U-BVH21-968.jpg Photo Gallery