Boeing X-45B/C

Manufacturer by Boeing Integrated Defense Systems, is an American company designed this aircraft for military use, the are deferent category the larger X-45B design was modified to have even more fuel capacity and three times greater combat range, becoming the X-45C. Each wing's leading edge spans from the nose to the wingtip, giving the aircraft more wing area, and a planform very similar to the B2 Spirits. The first of the three planned X-45C aircraft was originally scheduled to be completed in 2006, with capability demonstrations scheduled for early 2007. By 2010 Boeing hoped to complete an autonomous aerial refueling of the X-45C by a KC-135 Stratotanke. Boeing has displayed a mock-up of the X-45C on static displays at many airshows.
reference Wikipedia.com