Northrop Grumman X-47B Unmanned Combat Air Systems Demonstration (UCAS-D). US Navy Photo The chairman of the Senate Armed Services Committee (SASC) is calling on the Department of Defense and the Navy to develop a stealthy and lethal unmanned aerial vehicle (UAV) for the Navy’s Unmanned Carrier Launched Surveillance and Strike (UCLASS) aircraft, according to a Tuesday letter to Secretary of Defense Ash Carter obtained by USNI News. Read More → March 24, 2015 6:47 PM The following is a March 24, 2015 letter from Senate Armed Services Committee (SASC) chair Sen. John McCain (R-Ariz.) to Secretary of Defense Ash Carter on the Navy’s Unmanned Carrier Launched Surveillance and Strike (UCLASS).Read More →