take the threat seriously. elaine quijano is here with the story you will only see on "cbs this morning." >> good morning. in the complaint the 13 veteran flight attendants scheduled to fly from san francisco to hong kong last july alleged the airline did not take proper security measures when they brought their images to their attention. instead of searching the entire plane, they say united accused them of insobubordination and fired them. >> she showed us the picture of the graffiti together with two faces taken on the phone. that was the first time i saw the graffiti. >> reporter: on july 14th 13 flight attendants all of whom had been on the job 17 years, were preparing flight 869 when they learned graffiti had been discomped on the fuselage. bye-bye was scrawled in oil along the tail section nearly 30 feet off the ground. >> i was scared. i was frightened. i have flown as a flight attendant for 12 of 24 years and i have never seen anything like this. >> reporter: in the wake of...