With North Korea's growing nuclear threat and rising tensions with Russia, the U.S. administration of President Donald Trump may be beefing up its readiness to restart underground nuclear tests that have been suspended since 1992, a recent report by the National Nuclear Security Administration and sources close to the matter suggest.The annual NNSA report titled "Stockpile Stewardship and Management Plan (SSMP)," published in November, proposes a relatively new concept for nuclear tests, under which an experiment called a "simple test" would be conducted within "6-10 months" once the U.S. p…READ FULL ARTICLE