On September 11, 2001, the history of our nation changed forever and this year marks the 15th anniversary of the most devastating attack on our country. Osama bin Laden orchestrated militants to hijack four planes to engage in suicide attacks on our nation. American Airlines Flight 11 and United Airlines Flight 175 were each crashed into the north and south towers of the WTC, also known as the Twin Towers. Above, you can see the sad footage of the explosions, crashing, and burning of the towers.
Below is footage of when the towers started to collapse, killing thousands of people.
Continue to watch more coverage below, as bystanders and spectators tape their own footage of the horrific scene.