Russian forces have started withdrawing from positions in northeast Syria still controlled by the Kurdish-led Syrian Democratic Forces.

By Guy Faulconbridge MOSCOW, Feb 2 (Reuters) - Senior Russian security official Dmitry Medvedev has warned of the danger of letting the last U.S.-Russian nuclear arms control treaty expire this week without any understanding of what comes next,

While the first trilateral talks between Ukraine, Russia and the U.S. are a milestone, the issue of territorial concessions remains the key sticking point

Once the New START treaty ends, we will have returned to an era without limits, when arsenals can reach unconstrained heights.

MOSCOW, Feb 2 (Reuters) - Dmitry Medvedev, deputy chairman of Russia's Security Council, said that if the New START treaty expired with no replacement then the world should be alarmed that the biggest nuclear powers had no limits for probably the first time since the early 1970s.

On February 4, the New START Treaty, the last remaining nuclear arms control agreement between the United States and Russia, is set to expire. Signed in 2010, the agreement caps deployed strategic nuclear forces at 1,

To the world, the word 'destruction' is synonymous with the scarred landscapes and nuclear shadows left in the wake of the Second World War. Only with the help of nuclear treaties, the