Negotiations are needed to stop Moscow’s full-scale invasion of Ukraine, but Russian President Vladimir Putin “cannot be trusted,” Mark Milley, the former Chairman of the U.S. Joint Chiefs of Staff, said on June 21. In a talk at Princeton University, Milley said that from a military perspective the war was now at a stalemate with Russia unable to achieve its original goals. “It is unlikely that anyone will be able to achieve a political solution through military means,” he said in the comments as reported by Voice of America. “Therefore both sides should recognize this and achieve an alternati…