SEOUL, South Korea (AP) — The United States, South Korea and Japan conducted a joint missile defense exercise on Monday aimed at countering North Korea’s growing nuclear arsenal, as a top North Korean army official warned the U.S. that it risks “a clearer security crisis and insurmountable threats.â€

Last week, North Korea conducted one of its most provocative weapons demonstrations in years by an intercontinental ballistic missile powered by solid fuel. It is considered a more mobile, harder-to-detect weapon and could directly target the continental United States.

The ºÃÉ«tv Press. All rights reserved.