The XP-79 was the first jet-powered aircraft of the United States. It was designed to intercept enemy bombers with high speeds and ram into them without getting destroyed. Its shape, along with its strong magnesium armor, would allow it to severely damage or completely slice off tails and wings from enemy bombers. Because of its intended role, the XP-79 was nicknamed the "Flying Ram". In addition to its flying wing design and unusual role for an American World War II aircraft, it had a unique unpressurized cockpit that required the pilot to lie down in a prone position, similar to a glider.