Last Friday, North Korea, which has more than 1,000 missiles with at least 800 of them ballistic, rattled sabres by launching short-range missiles off its west coast.
Experts said North Korea, which tested a nuclear device in October 2006, developed an arsenal of short-range missiles to threaten the capital Seoul as well as South Korean and U.S. military bases near their heavily armed border.
North Korea, which wants to see U.S. soldiers removed from the peninsula, says it developed nuclear weapons to deter what it sees as a hostile policy from Washington.
Video: North Korea DPRK Military Force