联合发射联盟公司的宇宙神5-501型火箭2012年12月11日在卡纳维拉尔角空军站发射了美国空军X-37B无人小型航天飞机。这是X-37B第三次升空飞行,任务代号“轨道试验飞行器”(OTV)3。X-37B项目由空军快速能力办公室管理。美国空军一直对该航天飞机的任务和有效载荷细节保密。有专家猜测这种飞行器可用于材料科学、空间监视、成像和侦察。X-37B由波音政府航天系统公司建 The Cosmos God 5-501 rocket of the Allied Coalition Forces launched the USAF X-37B Unmanned Space Shuttle at Cape Canaveral Air Force Station on December 11, 2012. This is the third launch of the X-37B, code-named “Orbiter” (OTV) 3. The X-37B project is managed by the Air Force Quick Capabilities Office. The U.S. Air Force has kept the mission and payload details of the space shuttle confidential. Some experts speculate that this aircraft can be used for material science, space surveillance, imaging and reconnaissance. The X-37B was built by Boeing Government Aerospace Systems