President Obama has restricted the conditions under which the United States would consider using nuclear weapons, but stipulated that the limitations do not apply to any potential confrontation with Iran or North Korea.
VOA: standard.2010.04.11
Steve Andreasen, is a former arms control expert on the National Security Council, "It places limitations on strategic nuclear delivery vehicles - that is long-range bombers and long-range intercontinental ballistic missiles on submarines and based on land.
VOA: standard.2009.04.08
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