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The Kinetic Energy Interceptor (KEI) was a planned U.S. missile defense program whose goal was to design, develop, and deploy kinetic energy-based, mobile, ground and sea-launched missiles that could intercept and destroy enemy ballistic missiles during their boost, ascent and midcourse phases of flight.〔 (【引用サイトリンク】 Kinetic Energy Interceptor Program )〕 The KEI consisted of the Interceptor Component (kinetic projectile), the Mobile Launcher Component, and the Command, Control, Battle Management, and Communications (C2BMC) component. On May 7, 2009, KEI program was canceled due primarily to financial reasons. ==First stage rocket motor tests== There were five first-stage rocket motor tests planned to be carried out by Alliant Techsystems (ATK) in Promontory, Utah.〔 (【引用サイトリンク】 KEI Team verify flight configuration of First Stage Rocket Motor Components )〕 The second test firing of a KEI first stage rocket motor was conducted on June 14, 2007. The static firing included a full duration burn and a demonstration of the thrust vector control nozzle.〔 (【引用サイトリンク】 MDA Conducts Successful Test of Rocket Motor for Next Generation Interceptor Missile )〕〔 (【引用サイトリンク】 Program Images Library )〕 The fourth test firing of the first-stage rocket motor was completed on November 13, 2008. The test demonstrated a successful operation of the first-stage rocket motor in its final flight configuration that was to be used during a Summer 2009 flight test. Due to the cancellation of KEI in May 2009, this test did not occur.〔 (【引用サイトリンク】 KEI team completes Stage 1 rocket motor test )〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Kinetic Energy Interceptor」の詳細全文を読む スポンサード リンク
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