AH-1 Cobra, also known as "Huey Cobra ", "Cobra ", "Sea Cobra " and "Snake ", is a helicopter assault, designed by Bell Helicopter. Currently in the U.S. armed forces is only used in the Marine Corps, while in the U.S. Army was completely replaced in the AH-64 Apache. History of AH-1 is closely related to the development of UH-1 Iroquois - the predecessor of modern helicopters, and a symbol of war in Vietnam. XH-40 prototype lifted into the air for the first time