The Lockheed Martin/Boeing F-22 Raptor is primarily an air superiority fighter that uses stealth technology, but has multiple capabilities that include ground attack, electronic warfare, and signals intelligence roles. The USAF considers the F-22 a critical component of the U.S. strike force. The F-22 is claimed by multiple sources to be the world’s most effective air superiority fighter and cannot be matched by any known or projected fighter aircraft.