U.S. Marine Corps Lt. Col. Eddy I. Hansen, top center, the executive officer of the 11th Marine Expeditionary Unit, addresses Marines and Sailors aboard the amphibious transport dock ship USS San Diego (LPD 22) in the U.S. 7th Fleet area of responsibility Sept. 11, 2014, during a ceremony in remembrance of the victims of the 9/11 terrorist attacks and those who have since served. Terrorists hijacked four passenger aircraft Sept. 11, 2001. Two of the aircraft were deliberately crashed into the World Trade Center in New York; one was crashed into the Pentagon; the fourth crashed near Shanksville, Pa. Nearly 3,000 people died in the attacks.