Our current policy is nuclear deterrence, whereby we threaten the use of nuclear weapons against any adversary who uses nuclear, chemical, biological, or even massive conventional weapons against us.
Moxley, Charles J. Jr.
"The Unlawfulness Of The Use Or Threat Of Use Of Nuclear Weapons,"
ILSA Journal of International & Comparative Law: Vol. 8
, Article 11.
Available at: http://nsuworks.nova.edu/ilsajournal/vol8/iss2/11