Vincent Brooks

South Korea and the United States fired off missiles on July 5 simulating a precision strike against North Korea's leadership, in response to a landmark missile test described by Kim Jong-Un as a gift to "American bastards."

Two huge U.S. bombers flew over South Korea on Sept. 13 in a show of force against the North as a top U.S. envoy said China must help close loopholes in sanctions following Pyongyang's largest-ever nuclear test.

The supersonic B-1B Lancers reached airspace over the U.S. Osan Air Base at Pyeongtaek, 64 kilometers south of Seoul, at around 10 a.m.