When the Russian submarine Kursk sank in 2000, it was a conspiracy theorist's dream come true. Immediately, conflicting stories started pouring in from official sources, ranging from a US submarine ramming the Kursk to a potential Russia-China torpedo sales plot. The Russian Kursk submarine disaster captured the attention of millions, and the families of the crew were left struggling to find out what really happened to their loved ones. So what really happened to the Kursk?