Boeing X-45 Joint Unmanned Combat Aerial System

The F-22 were the last manned U.S. fighters. The Boeing X-45 Joint Unmanned Combat Aerial System (J-UCAS) series are a family of concept demonstrators for the next generation of stealthy jet fighters for high-risk missions like air supremacy and ground support. It is a new system "specifically designed for combat operations in the network-centric environment of the 21st century".

More: http://www.boeing.com/history/boeing/x45_jucas.html