The 1990s saw the arrival of the Lockheed YF-22 and the Northrop YF-23 prototype fighters, both using stealth technology and designed for air supremacy with agility, high-speed and supersonic cruise capability. Global Hawk, an unmanned aerial vehicle (UAV) was tested that has subsequently been used extensively for high-level reconnaissance in the skies of Afghanistan and Iraq began testing in February 1998. The MQ-1 Predator and MQ-9 Reaper attack counterparts, tested at Edwards, today fill a critical role in the Global War on Terrorism.