The DoD has planned to invest billions of dollars in development and procurement of unmanned aircraft systems. This testimony is based on an exam¿n. of 10 unmanned aircraft acquisition programs: Global Hawk, Reaper, Shadow, Predator, Sky Warrior, Fire Scout, Broad Area Maritime Surveillance, and Unmanned Combat Aircraft System-Demo., and Multi-Platform Radar Technol. Insertion Program, and Airborne Signals Intell. Payload. The testimony focuses on: (1) Cost, schedule, and performance progress of the 10 programs; (2) Extent to which the mil. services collaborated and identified commonality among the programs; (3) factors influencing the effectiveness of the collaboration; and (4) recent DoD investment decisions related to these acquisitions.