Witnesses testified on the problem of pilots becoming dizzy from oxygen deprivation while flying the Air Force supersonic F-22 Raptor aircraft. They talked about reports and consequences of respiratory and neurological problems experienced by pilots. They also talked about the results of a study by an independent review team from NASA which supported the Air Force’s conclusions. The subcommittee debated whether the jet was suitable to fly, while witnesses, including Major General Charles Lyon, insisted that the $350 million jet was safe.