"The emergence of new nuclear states, some of which are hostile to the US, has brought into question the future applicability of the nuclear deterrence concept. This paper addresses this fundamental question and its implications on future defense planning. It first discusses the dangers of the newly emerging nuclear states and the threats they pose to US interests. It then analyzes the declining utility of US nuclear weapons as a deterrent to the emerging threat. Finally, it recommends some options for dealing with the threat and enhancing overall deterrent capabilities."
Defense Technical Information Center (DTIC): http://www.dtic.mil/dtic/