An official has said there was some shouting, but it is not clear who was in control of the plane before it crashed.

CNN: Recorder reveals details of Flight 93 struggle

Some witnesses said the pilot appeared to deliberately turn the plane toward the vacant lot to avoid hitting people in the area, but Plagens said it was too early to say whether the pilot could control the plane.

CNN: One killed in California plane crash

Several relatives of those who died on United Flight 93, whose passengers tried to wrest control of the plane before it crashed in Shanksville, Pa.

WSJ: New TSA rules on knives draw fire from 9/11 kin

Paul Wellstone in a plane crash Friday has major implications on who will control the closely divided Senate, where his Democratic party clings to power by a single vote.

CNN: Wellstone death complicates Senate battle

But even those statistics may or may not include incidents in which the crew requested that local law enforcement meet the plane and take control of a passenger, an FAA spokeswoman said.

CNN: Air rage: Passengers 'quicker to snap'

AeroVironment's remote-control attack plane may be small, but it represents a big shift taking place in the U.S. military: Today's defense robotics are more focused on killing and less dependent on humans than ever before.

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