Nuclear security

U.S. Thinktank Says North Korea Has Increased Nuclear Activity

Analysts believe that high-level activity at North Korea's primary nuclear site may show more plutonium is being produced for use in nuclear weapons.

Experts have seen new satellite images of the facility at Yongbyon which appears to show increased activity at two sites, one of which is the five-megawatt reactor that many see as North Korea's primary source of enriched plutonium, according to AFP.