When a mysterious crescent appeared over Moscow in 1967, alien enthusiasts were unaware they were actually tracking a 3-megaton weapon designed to bypass American radar.

You heard Russian President Vladimir Putin is working on a nasty, new nuclear anti-satellite weapon. Leaders in Congress were briefed last week in a highly secret session, but it left me wondering: ...

Russia sortied ballistic missile submarines and land-based mobile missile launchers on March 1 in what was called a drill. Two days earlier, Vladimir Putin put Russian nuclear forces on "special ...