U.S. seeks to develop new version of nuclear gravity bomb

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Although the Defense Department said the development of a new version of a nuclear weapon is not a direct response to any recent global event, Assistant Secretary of Defense for Space Policy John Plumb (pictured at a U.S. House Armed Services subcommittee in March) emphasized the need for a new kind of weapon "reflective of a changing security environment and growing threats from potential adversaries." File Photo by Bonnie Cash/UPI | License Photo Oct. 27 (UPI) -- The U.S. Department of Defense announced Friday that it will begin working on the development of a new nuclear gravity bomb known as...