2015年5月6日,美国政府问责局(GAO)发布题为《导弹防御:在降低采办风险和改善系统能力报告方面存在机遇》的报告,全文83页。报告称,导弹防御局(MDA)在研制反弹道导弹防御系统方面已取得进展,但仍受到试验延迟和采购问题的困扰。GAO称,导弹防御局并未完成2014财年计划的6次导弹飞行试验。因试验计划过于自信,均以试验成功为前提,而未能进行自2010财年以来的所有试验计 On May 6, 2015, the U.S. Government Accountability Office (GAO) released a report titled “Missile Defense: Opportunities in Reducing Acquisition Risks and Improving System Capability Reporting,” 83 pages in full. The report said that the Missile Defense Agency (MDA) has made progress in the development of its anti-ballistic missile defense system but is still suffering from trial delays and procurement problems. The GAO said the Missile Defense Agency did not complete six missile flight tests planned for FY14. Due to the pilot project overconfidence, are based on the success of the trial as a precondition, but failed to carry out since the FY2010 since all test