TSA security checkpoint agents at Cincinnati/Northern Kentucky International Airport failed to adhere to protocol Friday evening when they discovered a box cutter in a man’s carry-on luggage ...

The Transportation Security Administration said it failed to detect a box cutter used to menace passengers on a flight last week, officials said Monday. The Frontier Airlines flight out of ...

A Frontier Airlines plane in Miami in 2021. A Frontier flight from Cincinnati to Tampa, Fla., was diverted to Atlanta on Friday after a passenger was seen with a box cutter, the airline said.

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Two box cutters that were brought on a plane by a passenger who later threatened to stab people were not identified during a scan, a Transportation Security Administration spokeswoman said.