1.   Bellona has focused on northwestern Russia, where submarine accidents, radioactive storage sites and the ocean dumping of nuclear waste have prompted fears of nuclear pollution.

2.   In the harsh light of the submarine accident, some Japanese were quick to dismiss the alliance as a relic of the Cold War that had outlived its purpose.

3.   Later, he raised public alarms over nuclear waste left in the Arctic by submarine accidents and haphazard disposal of spent reactor cores.

4.   Nikitin angered the security services by helping to prepare a chapter on Soviet nuclear submarine accidents.

5.   Nikitin helped prepare a chapter on Soviet nuclear submarine accidents, drawing on articles published in the Russian press, according to Bellona.

6.   Prosecutors say the former officer, Alexander Nikitin, harmed national security by reporting on Russian submarine accidents and the potential for nuclear contamination.

7.   Such accidents, while rare, highlight the danger of submarine accidents because of their potential for swift loss of life.

8.   The submarine accident had no direct link to Okinawa, but fanned the anger of politicians here.

9.   Three days after the submarine accident, many questions remain.

10.   A retired Russian admiral has accused navy officials of covering up fatal submarine accidents from the Soviet era in order to hide their incompetence, a newspaper said Tuesday.