U.S. Navy chief selectees stand in formation as Capt. Dave Welch, at lectern, the commanding officer of Surface Warfare Officers School, speaks during a 9/11 commemoration ceremony at Naval Station Newport, R.I., Sept. 11, 2014. 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.