EASTON, Mass. (AP) - Audio tapes reveal frantic attempts by a Boston air traffic controller to warn the pilot of a doomed "Angel Flight" that he was flying too low.
     
Moments later, the plane crashed into the parking lot of a shopping plaza in Easton, Massachusetts, killing all three people aboard, including the pilot from Connecticut.
     
At one point, the controller implores the pilot to "climb immediately" after dropping to a 1,200 low-altitude alert. The controller then asks the pilot: "Are you all right, Sir?"
     
After losing radar contact with the plane, the controller asks other pilots in the area if they had picked up a response from the aircraft. No one had.
     
Investigators from the National Transportation Safety Board are on the scene today examining the wreckage of the plane.
     
The Angel Flight was bringing a cancer patient from Long Island to a Boston hospital yesterday for treatment. Killed were the patient, Robert Gregory, and his wife, Donna Gregory, of Long Island, New York, and the pilot, Joseph Baker, of Brookfield, Connecticut.

ABC 6 reporter Jennifer Gannon has the very latest on the investigation...

Read Donna Gregory's personal blog