The Air Force and the Defense Department as a whole has been vocal about its shift to the Pacific, and usually that focuses on airmen heading across that ocean. But the continental U.S. also plays host to foreign airmen from other countries, and the service is highlighting a specific group: F-16 pilots visiting Idaho from Singapore, and the Air National Guardsmen training them. Mountain Home Air Force Base, Idaho, this month has been home to visiting Air National Guard pilots from Arizona who are training F-16 pilots from Singapore in combat air-to-air operations. The guardsmen, short on flying hours at…