A flight attendant is someone whose primary duty is to ensure the safety and comfort of passengers during an airline flight. They are part of the cabin crew for the plane, a team of personnel who operate a commercial, business, or even military aircraft while traveling domestically or internationally. Since the career began in 1912, male flight attendants have also been known as stewards or air hosts and females as stewardesses or air hostesses. Flight attendants are specially trained for the aircraft in which they work, since passenger safety is their foremost concern.