This is the most severe incident involving a nuclear submarine since the sinking of the Kursk in 2000 and the first time since the Cold War that two nuclear-armed subs are known to have collided. Submarine collisions are uncommon, but happens as in 1992, the USS Baton Rouge, a submarine belonging to the United States collided with the Sierra-class attack Russian submarine K-276 that was surfacing in the Barents Sea. The present crash could have been a coincidence but more probable that one vessel was chasing the other, trying to figure out what it was playing the cat and mouse sort of hide and seek game when submarines come across similar vessels from other navies, they seek to get as close as possible without being detected playing games with each other and stalking each other under the sea practicing being able to kill the other guy’s submarine before he could launch a missile. The crash, on the night of 3rd/4th February had destroyed the sonar dome of the French boat and left visible scrapes and dents on the hull of HMS Vanguard, which carries 16 Trident missiles and up to 48 nuclear warheads each eight times the power of the Hiroshima bomb while the french Le Triomphant, also the lead-boat in her class, carries the same number of missiles, though each warhead is even more devastatingly powerfull then Vanguard. The greatest danger in a collision was the hull being punctured and the vessel sinking, rather than a nuclear explosion. View the film on the Kursk submarine which sank in 2000 in the Barents Sea investigate as working hypothese as the collision with US submarine by doc filmmaker JM Carre mystery saga investigated docdrama presented here as dark legacy of secretive putin regime of autocracy and cruelty.The sinking of the Kursk nuclear submarine was not a collision with US sub in 2000 as the present story of French and British subs but due to accidental torpedo explosion inside the vessel during routine practice manoeuvres is Russia’s worst ever disaster. All 118 sailors aboard died while no rescue was offered by Putin. In the end all 118 members of the crew onboard were killed, in spite of a late and dramatic rescue effort from a British team to free the trapped Priz submersible and its crew of seven from the seabed. There is believe that 23 sailors who survived the first blast could be saved, had the Russian navy reacted in time.  French film by JM Carre mystery saga investigated docdrama presented here as dark legacy of secretive putin regime initiation of autocracy and unhuman cruelty. http://www.xmail.net/technologos/AAA.html