Nuclear security

North Korea May Be Preparing Its 6th Nuclear Test

New satellite images suggest that North Korea might soon conduct another underground detonation in its effort to learn how to make nuclear arms — its sixth explosive test in a decade and perhaps its most powerful yet.
North Korea’s nuclear tests have grown steadily more destructive, and the country continues to pursue its longtime goal of putting a nuclear warhead on an intercontinental missile capable of reaching targets around the globe.
The United States recently ordered an aircraft carrier and other warships toward the Korean Peninsula in a show of force intended to discourage the North from testing a nuclear weapon.
While examining satellite imagery, experts have observed a wide range of activity at Mount Mantap, a mile-high peak where North Korea conducts its nuclear tests. Beneath the mountain, a system of tunnels has been excavated for the past five detonations of the North’s nuclear bombs.