We're learning more about the bomb threat that grounded a Southwest Airlines flight here in the valley on Monday.
Each passenger on the airplane was interviewed by the FBI, which is making every effort to find out who phoned in the threat.
The flight was headed to Austin, Texas Monday from LA, but was forced to land at Sky Harbor. It was watched by two F-16's from Davis Monthan Air Force Base in Tucson as a precaution.
Phoenix police removed all 143 passengers and the crew when the plane landed, and they pulled the luggage out and searched the entire plane for any explosive devices.
No bomb was found on the plane, and passengers eventually made it to Austin -- but the investigation into who was behind that threatening call continues.
The whole thing was a big inconvenience for the passengers. But some say taking extra security measures was worth it.
"It was an inconvenience we had to wait 6 or so hours there but I think they took the necessary precautionary measures needed to ensure everybody's safety," said one flier who was aboard the Southwest flight.
"We're in good hands, we're happy that we're off the plane and you know it was tiresome but it was bearable," said another passenger.
So far no arrests have been made, but investigators say they're working to identify the person behind the call and why they did it.