Flight attendants at both regional and legacy airlines say they're frustrated by what they call low wages and long-standing airline practices of not paying them during the boarding process. Air Canada attendants recently went on strike, highlighting these issues. But in the U.S., flight attendants have found themselves locked in contract negotiations for years. A nearly century-old law in the U.S. makes it very difficult for airline workers to legally go on strike. Meanwhile, flight attendants say their wages haven't kept pace despite their jobs becoming more demanding in recent years with fuller planes and faster turnarounds.