September 11 Memorial at the Pentagon

A flower is seen on a bench at the National 9/11 Pentagon Memorial at the location of the September 11, 2001 terrorist attack, Arlington, Virginia, September 11, 2018. Today the country observes the 17th anniversary of the attacks, in which four airliners were hijacked and used in suicide attacks on both the World Trade Center towers, the Pentagon and the fourth crashing in Shanksville, Pennsylvania, 2,996 people were killed. Photo by Kevin Dietsch/UPI