NATO launched one of its biggest-ever anti-submarine exercises in the North Sea on May 4, inviting non-member Sweden for the first time, amid increasing tensions between Russia and its northern neighbors.
Reuters: NATO starts anti-submarine drills in North Sea as Russia tensions rise
A new Russian nuclear submarine, the Yuri Dolgoruky, drives in the water area of the Sevmash factory in the northern city of Arkhangelsk on July 2, 2009.
