Her brother, [Keith Wheelhouse], of Virginia Beach, spotted the planes first. The second plane looked similar to a C- 130 transport plane, he said. He believes it flew directly above the American Airlines jet, as if to prevent two planes from appearing on radar while at the same time guiding the jet toward the Pentagon.

Wheelhouse's account of a second plane is unlike everything else that has been reported about the attack. Some initial reports on television said a second airliner might be headed for the Pentagon, but authorities later dismissed that. A Norfolk-based FBI agent interviewed Wheelhouse Wednesday evening.

A possible explanation for the second plane could be a plane landing at nearby Ronald Reagan National Airport. The Pentagon is between the cemetery and the airport. But Wheelhouse insists he was not confused by other air traffic.