A woman, no name given, prepares to place a candle tribute at the St. Nicolas Cathedral in St.Petersburg,  where the lists of seamen who perished in submarine disasters are displayed, Thursday, Aug. 12, 2010.  Russian navy ships are flying flags at half-mast and memorial ceremonies are being held across the nation to commemorate the 10th anniversary of the Kursk nuclear submarine disaster. (AP Photo/Dmitry Lovetsky)

Photo by: Dmitry Lovetsky

A woman, no name given, prepares to place a candle tribute at the St. Nicolas Cathedral in St.Petersburg, where the lists of seamen who perished in submarine disasters are displayed, Thursday, Aug. 12, 2010. Russian navy ships are flying flags at half-mast and memorial ceremonies are being held across the nation to commemorate the 10th anniversary of the Kursk nuclear submarine disaster. (AP Photo/Dmitry Lovetsky)