This is a tribute poster of what happened in 9/11. Four passenger airliners were hijacked by 19 al-Qaeda terrorists so they could be flown into buildings in suicide attacks. Two of those planes, US Airlines Flight 11 and US Airlines Flight 175, were crashed into the North and South towers, respectively, of the World Trade Center complex in New York City. Within two hours, the two towers collapsed with debris and the resulting fires causing partial or complete collapse of all other buildings in the WTC complex, as well as significant damage to ten other large surrounding structures. A third plane, US Airlines Flight 77, was crashed into the pentagon, leading to a partial collapse in its western side. The fourth plane, US Airline Flight 93, was targeted at Washington, D.C. but crashed into a field near Shanksville, Pennsylvania, after its passengers tried to overcome the hijackers. In total, almost 3,000 people died in the attacks, including the 227 civilians and 19 hijackers aboard the four planes. It also was the deadliest incident for firefighters and for law enforcement officers in the history of the United States, with 343 and 72 killed respectively.
We Shall Never Forget 9/11
Here is a tribute video of 9/11: