Russia suspends only remaining major nuclear treaty with U.S.
Russian President Vladimir Putin declared Tuesday that Moscow was suspending its participation in the New START treaty — the last remaining nuclear arms control pact with the United States — sharply upping the ante amid tensions with Washington over the fighting in Ukraine. Speaking in his state-of-the-nation address, Putin also said that Russia should stand ready to resume nuclear weapons tests if the U.S. does so, a move that would end a global ban on nuclear weapons tests in place since Cold War times. Explaining his decision to suspend Russia's obligations under New START, Putin...