By COREY DICKSTEIN | STARS AND STRIPES Published: April 5, 2021 Speed and the failure to follow safety regulations were factors in the death of a 26-year-old U.S. airman, who was killed in September during a rollover wreck of an armored vehicle outside a Kuwait air base, an Air Force investigation determined. None of the three Air Force Security Forces airmen inside the Mine-Resistant Ambush Protected All Terrain Vehicle, or M-ATV, were wearing helmets or seatbelts, when the driver lost control of the 28,000-pound vehicle, flipping it over and ejecting Senior Airman Jason Khai Phan, an investigation board found. Phan, who was seated behind the driver, was killed instantly in the Sept. 12, 2020, wreck near the end of a 12-hour security patrol just outside Ali Al Salem Air Base, where he and the others were deployed.