Build a virtual time machine and travel back to September 10, 2001: the day before the twin towers fell. Take along with you a list of all the planes that crashed and the passenger lists. Underscore the names of the terrorists on each list. From the 101st floor of one of the towers, fax the list to major newspapers, radio stations, as well as the FBI, CIA and the White House. Cause all major airports to be shut down until the Towers are emptied and guarded.
When the Towers fail to fall on the following morning, go forward in time to September 11, 3001. Stand at the base of the Twin Towers and look straightProject Rebirth: Project Rebirth: up at the aging and abandoned towers that stand as a monument to your time traveling achievement.
Instead of documentaries about the destruction of the Twin Towers, only what-if movies will be filmed about what almost took place.