of its flights cancelled. for delta, weather snarling traffic at key hubs bike minneapolis and salt lake city and seattle. i spent about 12 hours in the san francisco airport. reporter: one delta flight from tampa to atlanta had to deal with criminal behavior. a woman ber raided a man for not wearing a mask. it evolves in punching and scratching. reporter: delta says the company has zero tolerance for unruly behavior. airlines for america and several airlines ceos supporting the shorter quarantine time issued