11.   Authorities said the voice recorder was too damaged by impact and heat to be useful.

12.   Aviation regulations, in fact, allow the use of portable voice recorders, pacemakers, hearing aids and, oddly enough, electric shavers during flight.

13.   Because of the foot-dragging over the cargo and the missing evidence like the cockpit voice recorder, numerous conspiracy theories were developed and suspicions were raised of a cover-up.

14.   Because digital voice recorders are not known for concert hall sound, the unit also includes a sound system that enhances playback quality.

15.   Black said investigators would analyze the cockpit voice recorder to determine what problems the pilots believed they were encountering as they approached the airport.

16.   Both the cockpit voice recorder and the flight data recorder in Pennsylvania have been sent to their manufacturer because their circuit boards are crushed, Tucker said.

17.   -- Commercial aircraft must have cockpit voice recorders and flight data recorders.

18.   A flight voice recorder, officials say, appears to capture Batouty in the cockpit and muttering a short prayer before the plane dove.

19.   A National Transportation Safety Board task force said in a preliminary report today that before the crash there were two apparent power interruptions to the cockpit voice recorder.

20.   A Justice Department official said the voice recorder from the American Airlines plane had been damaged.