Experts say terrorist groups are seeking materials for a crude nuclear device - a so-called "dirty bomb" - that would have limited blast potential but could spread radiation in a major urban area.

VOA: standard.2010.04.11

Japan and Australia, sponsors of rival grand commissions when a potential nuclear-free window opened at the cold war's end, have joined forces to set up a new one.

ECONOMIST: Nuclear disarmament

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

As great a potential threat as nuclear weapons proliferation - and as demanding of a coordinated international response - is the threat from failing and unstable states.

BBC: In full: Brown security statement