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A senior defense official declined to say Wednesday whether the Department of Energy can deliver nuclear warheads for next-generation intercontinental ballistic missiles on time if Congress does not fund both the plutonium-pit production plants the civilian agency wants to build. “I’m aware of the issue, but I wouldn't want to sort of step on my colleagues toes by addressing the details,” David Trachtenberg, deputy under secretary of defense for policy, said in a speech at the Washington-based Brookings Institute. “I’ll…
