Defense Secretary Jim Mattis told senators Tuesday the Trump administration's new "conditions-based" strategy in Afghanistan, which calls for deploying more than 3,000 additional U.S. troops, would help break a stalemate between NATO forces and anti-government insurgents. "Based on intelligence community analysis and my own evaluation, I am convinced we would absent ourselves from this region to our ultimate peril," he told the Senate Armed Services Committee . "Our new, conditions-based approach has set the stage for regional and Afghan national...