MEMORIAL REMARKS U.S. Navy Adm. Mike Mullen, chairman of the Joint Chiefs of Staff, speaks at the 9/11 commemoration ceremony at the Pentagon, Sept. 11, 2009. It marks the eighth anniversary of the terrorist attacks that killed 59 passengers onboard hijacked American Airlines flight 77, which crashed into the Pentagon to kill 125 inside. SHARE: Download: Full Size (0.05 MB) Credit: VIRIN: 400376-Z-ARK44-292.jpg Photo Gallery