NEW YORK (AP) — Authorities say a JetBlue pilot lost his government-issued handgun after a passenger on another flight mistakenly picked up his carry-on luggage.An official familiar with the incident tells The Associated Press that the pilot was waiting at Kennedy Airport for his New York-to-Pittsburgh flight on Thursday morning when a passenger picked up the bag. Inside was a gun that the Transportation Security Administration had given him as part of a program that trains pilots to fight off hijackers.The passenger realized she was carrying too many bags and notified a flight attendant.The official was unauthorized to speak publicly about the incident and spoke on condition of anonymity to the AP.The Transportation Security Administration was investigating. JetBlue says it's cooperating with the investigation.