MOSES LAKE, Wash. — The first flight of a hydrogen-powered airplane was a success this week, showing zero-emissions air travel could be on the horizon. The 40-passenger regional airliner using hydrogen fuel cell propulsion took off at 8:41 a.m. Thursday from Grant County International Airport and flew 15 minutes, reaching an altitude of 3,500 MLS. The aircraft, nicknamed Lightning McClean, was developed by California-based company Universal Hydrogen.