The Boeing Joint Unmanned Combat Air System (J-UCAS) X-45 is the first highly autonomous, unmanned system specifically designed for combat operations in the network-centric environment of the 21st century. The Defense Advanced Research Project Agency, the U.S. Air Force, and Boeing have completed the first two demonstration blocks on the X-45A and are developing the X-45C. The X-45C will fly high-risk operational missions and deliver precision weapons on target. Controlled by either line-of-sight or satellite communications, the X-45 is highly adaptable to changing battle conditions.