(POWELL, WY) – Two Alaska men are lucky to be alive after crashing a single-engine plane in Yellowstone National Park Friday. Officials say the father and son had just taken off from an airport in Cody, Wyoming when their aircraft went down in the east end of the park near Sylvan Pass. The pair were flying to Boise and had to spend the night next to the wreckage before rescue crews arrived. Neither of the men suffered life-threatening injuries. The crash remains under investigation.