The World Health Organization on Monday raised its alert level for swine flu, edging the body closer to declaring a flu pandemic, while the death toll in Mexico, where the disease originated, neared 150. Half a dozen countries, including the United States, have identified swine flu cases, likely vectored by air travel. Governments across the planet are bracing for a full-blown pandemic that could claim thousands of lives. Among U.S. agencies, the Pentagon could arguably play a leading role in combating the disease. Recent emphasis on humanitarian assistance and disaster relief has prepared the military for a global public health […]