Fel motor?

In December, 2005, The Power Hour interviewed aircraft experts about the South Tower crash aircraft:

Col. George Nelson USAF (ret.), who has 30 years of experience identifying aircraft and aircraft parts stated, “The plane that hit the south tower on 9/11 was not United Airlines (UA) flight 175”. After reviewing numerous video clips and photographs of the 9/11 attacks, he concluded, “That was not a commercial airliner. The planes were substituted.”

http://home.att.net/~south.tower/STengine1.htm