In this undated video grab provided released by the Russian Defense Ministry, a Russian Poseidon nuclear-powered underwater drone is photographed being test-launched, in Russia. Russian Deputy Foreign Minister Sergei Ryabkov said that the Poseidon doesn't fall under the New START arms control treaty with the United States, but added that Moscow is ready to discuss it as part of broader talks with Washington on strategic stability. (Russian Defense Ministry Press Service via AP) **FILE**
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