"The Defense Science Board Task Force on Nuclear Deterrence Skills was chartered to assess all aspects of nuclear deterrent skills--military, federal, and contractor--and to recommend methods and strategies to maintain a right-sized, properly trained, and experienced work force to ensure the viability of the U.S. nuclear deterrent through 2020. [...]. Today, deterrence of major power nuclear threats and the prospects of global war have receded in national priority while nuclear proliferation terrorism and defense have become urgent concerns. Today's nuclear security enterprise devotes the energy and attention to proliferation and terrorism issues that once were reserved for nuclear offensive forces. It is in that context that this task force reviewed nuclear deterrence expertise."
Defense Science Board: http://www.acq.osd.mil/dsb/