This thought-provoking presentation examines the routes taken by the four aircraft directly involved in the events of September 11, 2001. Additionally, what about the transponder codes for the aircraft? They mysteriously changed during that fateful day. This video also looks at the fact that back in 2001, the Pentagon already had existing technology capable of controlling aircraft by remote control, which could automatically and safely commandeer and land hijacked aircraft! (See article: Home Run: Electronically Hijacking the World Trade Center Attack Aircraft)