Security experts question border mission for military

WASHINGTON (AP) — Defense Secretary Jim Mattis has left no doubt that his top priority as leader of the military is making it more "lethal" — better at war and more prepared for it — and yet nothing about the military's new mission at the U.S.-Mexico border advances that goal. Some argue it detracts from it.The troops going to the border areas of Texas, Arizona and California are a small fraction of the military's roughly 1.3 million active-duty members, and the mission is set