All tests for the fourth-generation strategic nuclear submarine Yuri Dolgoruky have successfully completed, officials of the submarine\'s producer Sevmash shipyard said Thursday. During the five-day sail on the open sea, the submarine\'s crew also successfully tested the launch of the new Bulava intercontinental ballistic missile from underwater last Saturday. The Bulava, expected to become Russia\'s main naval strategic missile, is capable of carrying 10 warheads to a range of 8,000 km. The Yuri Dolgoruky, named after a hero of Moscow, was launched in 2007. Sevmash shipyard is building two similar submarines.