Keywords: Unmanned X-47B 140410-N-UZ648-001.jpg en The unmanned X-47B conducts its first night flight April 10 over Naval Air Station Patuxent River Md Night flights are the next incremental step in developing the operations concept for more routine flight activity The Navy will continue to execute X-47B test events to mature standard operating procedures for cooperative use of the airspace with manned aircraft 2014-04-10 U S Navy photo by Erik Hildebrandt/Released https //www dvidshub net/image/1246027 140410-N-UZ648-001 2014-04-14 23 04 PATUXENT RIVER MD US PD-USGov-Military-Navy Naval Air Station Patuxent River Northrop Grumman X-47B Images from DoD uploaded by Fæ |