@cbsnews: Air traffic control audio captures the harrowing final moments of a Learjet 60 carrying nine people before it nose-dived and crashed near homes in Palm Beach County, Florida, Sunday afternoon, killing everyone on board, officials said. In the recording, the pilot can be heard declaring a Mayday and reporting a rapid descent, with increasing urgency and distress in the cockpit. The jet had departed Austin-Bergstrom International Airport in Texas and was bound for the Bahamas when it crashed just before 1 p.m. local time, according to the FAA. No one on the ground was injured, and approximately 600 people were evacuated from the area near a mobile home park in Cresthaven. Officials have not yet disclosed what caused the crash.