We know it crashed, but not why "I know of two people -- I will not mention names -- that heard a missile," Stuhl said. "They both live very close, within a couple of hundred yards. . .This one fellow's served in Vietnam and he says he's heard them, and he heard one that day." The mayor adds that based on what he knows about that morning, military F-16 fighter jets were "very, very close."

Three-minute discrepancy in tape Cockpit voice recording ends before Flight 93's official time of impact. THE FINAL three minutes of hijacked United Flight 93 are still a mystery more than a year after it crashed in western Pennsylvania - even to grieving relatives who sought comfort in listening to its cockpit tapes in April.

WHAT DID HAPPEN TO FLIGHT 93? The unmarked military-style jet swooped down at high speed through the valley, twice circled the smouldering black scar where Flight 93 had careered into the ground just seconds earlier and then hurtled off over the horizon.

US Army Patents New Biological Weapons Delivery System The United States Army has developed and patented a new grenade that it says can be used to wage biowarfare. This is in violation of the Biological Weapons Convention, which explicitly prohibits development of bioweapons delivery devices.