WASHINGTON, United States (AFP) — United States Defense Secretary Jim Mattis on Thursday warned that war with North Korea would be “catastrophic” and said diplomatic efforts were yielding results. Speaking at an event in California, Mattis said his mission and responsibility was to have military options ready “should they be needed” but stressed the US effort is currently focused on diplomacy. “The American effort is diplomatically led, it has diplomatic traction, it is gaining diplomatic […]