A United Airlines flight diverted to Salt Lake City last week after the pilots discovered a crack in one of the layers of the windshield, and a weather balloon may have been what caused the crack, according to the company that owns the balloon.

The National Transportation Safety Board, which is investigating the incident, told CBS News Sunday that the windscreen of United Flight 1093, which was en route Thursday from Denver to Los Angeles, was being sent to its laboratory for examination.

The multilayer windshield is designed to continue to function in case one of the layers is damaged, according to officials.

NTSB Investigators are trying to determine if something struck the windshield of the Boeing 737 mid-flight and if so, what that object was. As part of the investigation, the NTSB

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