U.S. Navy Chief Electronics Technician Joseph A. Qualls, center left, reads the flight numbers of the four commercial airliners hijacked on 9/11 as Chief Sonar Technician Submarines David C. Kanski tolls a bell during a ceremony Sept. 11, 2012, at Naval Base Kitsap, Wash. The event marked the anniversary of the terrorist hijackings of the four aircraft on the morning of Sept. 11, 2001. The hijackers deliberately crashed two of the planes into the World Trade Center in New York and one into the Pentagon. The fourth aircraft crashed near Shanksville, Pa. Nearly 3,000 people died in the attacks.