The United States, South Korea and Japan staged a combined air drill in response to the North's ICBM launch. The trilateral exercise on Sunday mobilized a U.S. B-1B bomber and fighter jets from the allies over waters east of South Korea's Jeju Island.

The South Korean Missile Strategy Command fired a Hyunmoo-2 missile from South Chungcheong Province, about 65 miles southwest of Seoul, to demonstrate the command’s ability to make “precision strikes against the enemy’s origin of provocation,” according to a news release Friday from the Joint Chiefs of Staff.

South Korea says the U.S. has flown a long-range bomber in a trilateral drill with South Korea and Japan in response to North Korea’s recent test-firing of a new intercontinental ballistic missile designed to strike the U.

"I believe that it would be irrational for them to decide to wage a nuclear attack against the Republic of Korea and should they do so the nuclear-based ROK-U.S. alliance will imm

South Korea plans to test-fire a short-range ballistic missile in response to the North aunching an intercontinental ballistic missile, according to a South Korean news report.

President Yoon Suk Yeol said a nuclear-based alliance between South Korea and the United States will immediately strike if North Korea attempts a nuclear attack against the South, according to an interview published Friday.