客室乗務員
Flight attendant unions were formed, beginning at United Airlines in the 1940s, to negotiate improvements in pay, benefits and working conditions. Those unions would later challenge what they perceived as sexist stereotypes and unfair work practices such as age limits, size limits, limitations on marriage, and prohibition of pregnancy. Many of these limitations have been lifted by judicial mandates. The largest flight attendants' union is the Association of Flight Attendants, representing nearly 60,000 flight attendants at 19 airlines within the US.