The V-22 Osprey is a multi-mission tiltrotor aircraft developed for the U.S. military by Bell Helicopter and Boeing. It combines the vertical takeoff and landing capabilities of a helicopter with the speed and range of a turboprop aircraft. Development began in 1981 and took many years due to technical challenges. The U.S. Marine Corps began flying the Osprey in 2007 and it has since been used in combat missions in Iraq, Afghanistan, and Libya. Over 200 Ospreys have been produced as of 2014 with total costs of around $35 billion for the program.