Government investigators are gathering data to confirm what exactly cracked the windshield of a 737 Max aircraft at above 30,000 feet. An United Airlines Boeing 737 MAX 9 airplane, similar to the one that was struck, approaches San Diego International Airport for a landing.Photograph: Kevin Carter; Getty Images Save this storyThe National Transportation Safety Board confirmed Sunday that it is investigating an airliner that was struck by an object in its windscreen, mid-flight, over Utah. "NTSB gathering radar, weather, flight recorder data," the federal agency said on the social media site X. "Windscreen being sent to NTSB laboratories for examination." The strike occurred Thursday, during a United Airlines flight from Denver to Los Angeles. Images shared on social media showed that one of the two large windows at the front of a 737 MAX aircraft was significantly cracked. Related images also reveal a pilot's arm that has been cut multiple times by what appear to be small shards of glass.