No one wants Russian nuclear blackmail to succeed. Still, the risk remains that Russia will use a nuclear weapon in Ukraine. A troubling new development is the nuclear militancy expressed in Russian ...

In mid-September, officials noted that even as worries of nuclear escalation lurked in the background, Mr. Putin had various steps to take, short of using such a weapon, to escalate the conflict ...

A diver off the west coast of Canada may have found a US nuclear weapon missing since 1950. ... Background - by Gordon Corera, BBC security correspondent.

BACKGROUND TO A CRISIS ... a nation as rich in oil and natural gas reserves as Iran had no legitimate need for a nuclear program. ... used to form the core of a nuclear weapon. During the ...