A U.S. Customs and Border Patrol drone was purposely crashed into the ocean about 20 miles southwest of San Diego after it developed a mechanical problem. The Customs Office of Air and Marine Flight crew deliberately crashed the unmanned aircraft about 11:15 Monday night. For safety reasons they have grounded all drones until they figure out what went wrong. The drones are not cheap, they're valued at around 12-million dollars. It was based out of Corpus Christi, Texas and went down about 20-miles southwest of Point Loma.