2002年12月19日，加利福尼亚州，第一架X-45A无人作战技术验证机（UCAV）完成了第六次飞行，此次飞行持续了40分钟，达到195节的空速和7500英尺的高度，为X-45提供技术支持的是美国宇航局（NASA）位于加州的德莱顿（Dryden）飞行研究中心，包括数据分析，组件开发，地面模拟和飞行试验。X-45是美国国防部先进研究项目局（DARPA）和美国空军联合开发项目，主要用来验证无人作战飞机的技术可行性，以更快、更高效的应付21世纪的全球突发性事件。（The DARPA/U.S. Air Force X-45A Unmanned Combat Air Vehicle (UCAV) system demonstration program completed the first phase of demonstrations, known as Block I, on Feb. 28, 2003.The final Block I activities included two flights at Dryden, during which safe operation of the weapons bay door was verified at 35,000 feet and speeds of Mach 0.75, the maximum planned altitude and speed for the two X-45A demonstrator vehicles.）

2004年4月18日，加利福尼亚州，X-45A首次进行GPS制导武器投放测试，X-45是美国国防部先进研究项目局（DARPA）和美国空军联合开发项目，主要用来验证无人作战飞机的技术可行性，以更快、更高效的应付21世纪的全球突发性事件。（The DARPA/U.S. Air Force X-45A Unmanned Combat Air Vehicle (UCAV) system demonstration program completed the first phase of demonstrations, known as Block I, on Feb. 28, 2003.The final Block I activities included two flights at Dryden, during which safe operation of the weapons bay door was verified at 35,000 feet and speeds of Mach 0.75, the maximum planned altitude and speed for the two X-45A demonstrator vehicles.）

2003年2月28日，加利福尼亚州，美国国防部先进研究项目局（DARPA）和美国空军联合开发的X-45A无人作战飞机（UCAV）进行第一阶段飞行系统测试时打开弹仓，此次舱门是在高度35,000英尺，速度0.75马赫下安全打开的。（The DARPA/U.S. Air Force X-45A Unmanned Combat Air Vehicle (UCAV) system demonstration program completed the first phase of demonstrations, known as Block I, on Feb. 28, 2003.The final Block I activities included two flights at Dryden, during which safe operation of the weapons bay door was verified at 35,000 feet and speeds of Mach 0.75, the maximum planned altitude and speed for the two X-45A demonstrator vehicles.）