In photos: Ceremonies mark 17th anniversary of 9/11 attacks
Tuesday, September 11, 2018 - 09:40
in Mathematics & Economics
Ceremonies mark the 17th anniversary of the terrorist attacks on September 11, 2001, in which four airliners were hijacked. Two crashed into the World Trade Center in New York City, another hit the Pentagon in Washington, D.C. A fourth, headed for D.C., crashed in Shanksville, Pa. Nearly 3,000 people were killed.