People watch preparations for the 'Tribute in Light' ceremony that takes place each year to commemorate the 9/11 attacks in New York City, seen here on Sept. Then at 10:03 a.m., United Flight 93 crashed into a field in Shanksville, Pennsylvania. Both towers soon collapsed - the South Tower just before 10 a.m., then the North Tower a half-hour later.Īmerican Airlines Flight 77 hit the Pentagon at 9:37 a.m. At 9:03 a.m., the second plane, United Airlines Flight 175, hit the World Trade Center's South Tower. ET, killing everyone aboard and trapping people in upper floors of the tower. The first plane, American Airlines Flight 11, crashed into the World Trade Center's North Tower at 8:46 a.m. The exact number is unknown, but firefighter union leaders say 341 FDNY members have died of illnesses related to 9/11, CBS New York reports. In addition to the toll that day, the World Trade Center attack exposed hundreds of thousands of people in lower Manhattan to toxic air and debris, and hundreds have since died from post-9/11 related illnesses. With advancements in DNA technology, remains of two victims were ID'd just last week. The painstaking process of positively identifying the remains of those killed at the World Trade Center continues more than two decades after the attack. Law enforcement officers ring a bell as names are read during a remembrance ceremony on the 22nd anniversary of the terror attack on the World Trade Center, in New York City on Sept.

Another aircraft crashed into an open field in Pennsylvania after passengers fought back - the only plane that didn't reach its intended destination.

Two planes flew into the World Trade Center's Twin Towers in New York.

911 remembrance day clipart