Seconds From Disaster

Kursk: Russia's Nuclear Nightmare (3x3)

Air date: Apr 18, 2006

When a training mission goes horribly wrong, the Russian sumbarine Kursk suffers an explosion. 135 seconds later, it sinks. 23 people survive the blast, out of 118 on board. Will they make it out in time? What caused the sinking of the Kursk?