In recent years Britain has turned up the rhetoric, putting Iran alongside the likes of North Korea as a potential nuclear enemy.

VOA: standard.2010.04.30

The United States, which wants assurances that Iran is not secretly trying to build a nuclear weapon, has been trying to line up support for potential new sanctions.

VOA: standard.2009.10.13

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

O'HARA: Dan Blumenthal says the new report also defines a broader potential nuclear threat to the United States.

NPR: U.S. Notes Growing Chinese Military Strength

The two sides agreed to set up a new telephone hotline to alert each to potential nuclear risks.

BBC: NEWS | South Asia | Pakistan tests mid-range missile

Ouyang advocates eventually mining the moon for minerals such as titanium and for potential nuclear fuels such as helium-3.

NPR: China Aims High For Its Space Program