A 6-month TMZ investigation raises serious questions ... was there a 5th plane targeted by hijackers on 9/11? The flight attendants and pilot aboard United Flight 23 believe they were indeed targeted, and they make their case tonight on FOX at 9 PM. United 23, a 767 aircraft, was scheduled to depart JFK at 9 AM, bound for L.A. Six passengers aroused the suspicion of flight attendants for various reasons. Among them ... they were convinced one of the passengers was a man disguised as a woman.

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