A United 767 scheduled to take off from JFK Airport on September 11, 2001 could have been the 5th plane targeted by hijackers, according to flight attendants and the pilot on that plane. TMZ has conducted a 6-month investigation into United Flight 23 which was scheduled to leave JFK at 9 AM bound for Los Angeles. The special includes interviews with flight attendants, the pilot, the United dispatcher, a member of the 9/11 Commission and others about a series of suspicious activities on the plane…suspicious enough for the FBI to get involved.