Moscow's cover-up of the Kursk submarine incident seriously damaged Russian President Vladimir Putin's prestige—and was even viewed by some as a "turning point" for modern Russia. On August 12, 2000, ...

In the 1970s, the Soviet Union built the K-278, an advanced nuclear-powered submarine designed to push the limits of technology. But during a patrol in 1989, disaster struck when a turbine failure led ...

With an Argentine submarine missing for five days with 44 people aboard, we recall five of the most deadly submarine disasters over the past few decades. Russian authorities controversially refuse ...