FILE - In this Dec. 10, 2020, file photo, an electronic sign warns travelers to maintain social distance in the terminal of Denver International Airport in Denver. About one-fifth of flight attendants say they’ve gotten into a physical incident with a passenger this year. That’s according to a survey by their union. The Association of Flight Attendants says it wants people who act up during flights to face criminal prosecution — not just fines. Airlines have reported more than 3,600 cases of unruly passengers this year. Disputes over face masks are the most common trigger. Federal rules require face masks on planes until mid-Sept (AP Photo/David Zalubowski, File)
DALLAS — Nearly one in five flight attendants say they have witnessed physical incidents involving passengers this year, and their union is calling for criminal prosecution of people who act up on planes.