according to a delta spokesman. witnesses reported he commandeered the aircraft's intercom and told them to prepare to use the oxygen masks. one witness told cnn he feared the worse during the intense encounter. >> people behind me were saying that's bad. it only happens when a plane goes down. i prayed to god ato protect my family. >> reporter: a flight from l.a. to new york was diverted after described by a customer issue on board. on june 4th, a third delta flight, this one from l.a. to nashville forced to make an energy landing after a passenger tried reaching the cockpit door. delta is not alone. american and southwest airlines have been among those subjected to belligerent passengers. in at least one case, physical abuse from troublesome travelers. in may, the head of the federal aviation administration said he's worried as these kinds of