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BGM-75 AICBM
The ZBGM-75 Advanced Intercontinental Ballistic Missile, also known as Weapons System 120A (WS-120A), was a program to develop an intercontinental ballistic missile (ICBM), proposed by the United States Air Force in the 1960s as a replacement for the LGM-30 Minuteman as the Air Force's standard ICBM. Funding was not allocated for the program and the project was cancelled in 1967.
==Background==
The Department of Defense began the STRAT-X study on 1 November 1966 to evaluate a new ballistic missile proposal from the Air Force,〔Friedman 1994, p.202.〕 which was designated the Advanced Intercontinental Ballistic Missile (AICBM). The project was intended to provide a successor to the LGM-30 Minuteman ICBM then in United States Air Force service.〔Parsch 2003〕 The program was officially launched in April 1966, and in June the project received the designation ZBGM-75,〔 the "Z" prefix indicating a project in the planning stage.〔Parsch 2009〕
The specifications for the ZBGM-75 called for a large solid-fuel-powered missile,〔Tammen 1973, p.88.〕 which would be fitted with between 10 and 20 multiple independently targetable reentry vehicles (MIRVs).〔 The missiles would be based in silo launchers, which were specified to be hardened by a factor of 10 over the existing silos used by Minuteman missiles.〔Hartunian 2003〕 In addition, there was also a plan to develop a railroad-based deployment system for the AICBM.〔 Improvements in accuracy over existing missiles, combined with penetration aids under development to enhance the effectiveness of each missile, were expected to make the AICBM capable of defeating existing and projected Soviet anti-ballistic missile systems.〔Auten 2008, pp.42–43.〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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