October 20, 2001 F.B.I. Asks if Hijacking Plot Included Plane at Kennedy By MATTHEW L. WALD ASHINGTON, Oct. 19 — The Federal Bureau of Investigation is looking into whether a United Airlines flight scheduled to leave Kennedy International Airport for San Francisco was a target of hijackers on Sept. 11, aviation and law enforcement officials said. The United plane, Flight 23, was late pushing back from the gate and was seventh in line for takeoff when Kennedy was closed because of the terrorist attacks. When the captain announced that the plane was returning to the gate, four male passengers ...