The world's last major nuclear arms control treaty, New START, officially lapsed on Thursday, leaving the two largest atomic arsenals, those of Russia and the United States, without any limits for the first time in over 50 years. This development has ignited concerns about a potential unconstrained nuclear arms race.
Last year, Russian President Vladimir Putin had indicated a willingness to maintain the treaty's limits for an additional year, provided Washington agreed. However, Donald Trump remained undecided on its extension.
