B-1B bomber joins U.S.-South Korea drills as tensions escalate

By Christine Kim and Hyonhee ShinSEOUL (Reuters) - A U.S. B-1B bomber on Wednesday joined large-scale U.S.-South Korean military exercises that North Korea has denounced as pushing the peninsula to the brink of nuclear war, as tension mounts between the North and the United States.The bomber flew from the Pacific U.S.-administered territory of Guam and joined U.S. F-22 and F-35 stealth fighters in the annual exercises, which run until Friday.The drills come a week after North Korea said it had t