September 11th, 2001.
The morning of this date those dirty rat bastard terrorists put America through a living hell, taking thousands of innocent lives and destroying the lives of those who lost loved ones. Firemen who tried to save lives were ruthlessly murdered, and will be forever remembered as heroes. The day when time stopped, and America stood still, watching in horror along with the rest of the world. No one knew what would come next.
There is no conspiracy theory needed: this event was horrible enough as it is, left alone in truth.
September 11th, 2001, was the most tragic day in America recently.