There was a close call in the Atlantic a few days ago when two nuclear submarines collided in the Atlantic Ocean. Both vessels, a British Royal Navy sub dubbed HMS Vanguard and France's Le Triomphant, were carrying nuclear warheads on their respective "standard patrols," the French Ministry of Defense said. "They briefly came in contact in a very slow speed while they were immersed." Luckily, there were no injuries or security scares and both ships returned safely to shore. In a worst-case scenario, the collision could have emitted radiation and nuclear warheads into the ocean. "The dents reportedly visible on the British sub show the boats were no more than a couple of seconds away from total catastrophe," the chair of the Campaign for Nuclear Disarmament explained.