Delta 89 was tracked by NEADS for three minutes. Its existence has been ignored by the 9/11 Commission as well as authors Michael Bronner and Lynn Spencer.
But the NORAD tapes are proof: Delta 89 was NOT Delta 1989. And almost certainly Delta 89 was a live-fly exercise, covered up by Delta 1989.
Call sign....................Delta 1989.........................Delta 89
Flight plan.................Boston-Los Angeles..............Boston-Las Vegas
Squawk code...............1304.................................7112
Direction at 9:43.........westbound........................southwest/southbound
Transponder...............continously working.............turned off at 9:44
More here:
http://911woodybox.blogspot.com/2009/06/delta-89-code-7112-faker-hijack.html