http://www.cbsnews.com/stories/2002/04/22/national/main506904.shtmlThe first indication that something was amiss came at
4:52 p.m. EST when controllers at St. Petersburg called their Tampa colleagues and alerted them.
"That's a Cessna departed here unauthorized. We don't know what he's doing. He just took off," the St. Petersburg controller said, asking Tampa to have him call if they got in touch with him.
But according to the transcript, there was no indication the controllers ever tried to call the plane.
At 5:02 p.m., a Coast Guard helicopter told the Tampa controllers that it was chasing the plane.
"We're trying to give him hand signals to maybe get him to land," the Coast Guard told the controller. "However, he doesn't seem to be responding."
A minute later, the transmitter sounded, signaling the crash. The Tampa airport then stopped all departures. Not until two minutes later did the Tampa controller ask the Coast Guard pilot if he knew what building the pilot flew into.
http://www.cnn.com/2002/US/01/05/tampa.crash/As the plane took off, air-traffic control alerted the U.S. Coast Guard, which dispatched a helicopter to intercept the Cessna, said Lt. Charlotte Pittman of the Coast Guard. The helicopter's crew, yards away from the Cessna, signaled for it to land at an airport just south of Tampa. Instead, the airplane struck the building without appearing to try to avoid it, witnesses said.
The unauthorized take-off also prompted authorities to scramble two F-15 jets. The jets, part of the 125th Fighter Wing based at Homestead Air Force Base in Miami, Florida, arrived at the west-central Florida city within moments, but not before the Cessna had crashed, said Capt. Richard Bittner, the base's public information officer.