A US Air Force WC-135R aircraft, occasionally called a "nuke sniffer", circled near Russia's northwestern Murmansk region ...

Tensions between Russia and the United States have escalated following President Putin's move to deploy 4 nuclear bombers to ...

In this Dec. 8, 1987, file photo, U.S. President Ronald Reagan, right, shakes hands with Soviet leader Mikhail Gorbachev ...