U.S. Air Force F-16 fighter jets fly over the Sept. 11 Remembrance Ceremony at the Pentagon. U.S. Air Force F-16 fighter jets fly over the Sept. 11 Memorial Service at the Pentagon. More than 13,000 people attended the service to remember those who lost their lives one year ago when terrorists crashed a commercial airliner into the Pentagon. SHARE: Download: Full Size (0.02 MB) Credit: VIRIN: 953181-M-YME17-260.jpg Photo Gallery