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He is critical of the development and deployment of nuclear weaponry by the US, the UK, and France. In 2005 he discovered a draft document on a Pentagonwebsite that proposed a change in U.S. nuclear doctrine to include the possibility of a preemptive nuclear strike. Even though SecretaryRumsfeld had not approved the change, its publication provoked a reaction from some members of Congress.
^Burns, Robert (October 26, 2008). "US considering implications of nuclear decline". USA Today (Washington, D.C.: Gannett). Associated Press. Retrieved November 28, 2010. The chairman of the Joint Chiefs of Staff, Adm. Mike Mullen, wrote in the current issue of an internal publication, Joint Force Quarterly, that the United States is overdue to retool its nuclear strategy. He referred to nuclear deterrence -- the idea that the credible threat of U.S. nuclear retaliation is enough by itself to stop a potential enemy from striking first with a weapon of mass destruction.
... "It's completely overblown," said Hans M. Kristensen, who tracks nuclear weapons developments for the Federation of American Scientists. The advocacy group opposes the Bush administration's proposal to develop a new nuclear weapon design. The number of nuclear weapons in the U.S. arsenal is a state secret. But Kristensen and a fellow expert, Robert S. Norris, estimate that the total stood at nearly 5,400 warheads at the start of this year. That includes an estimated 4,075 ready for potential use and 1,260 in backup status. In an interview, Kristensen argued that even though the number is declining, the capability of remaining weapons is increasing as older missiles, for example, get new engines, guidance sets and computer software. Gates takes a different view. He has expressed concern about lack of official attention to the nuclear arsenal.