Ahead of Trump summit, new activity at North Korea nuke site

Tokyo: Increased activity at a North Korean nuclear site has once again caught the attention of analysts and renewed concerns about the complexities of denuclearization talks as President Donald Trump prepares for a summit with Kim Jong Un.
Satellite imagery taken last month suggests the North has begun preliminary testing of an experimental light water reactor and possibly brought another reactor online at its Yongbyon Nuclear Research Center.
Both could be used to produce the fissile materials needed for nuclear bombs.
The findings come at a particularly sensitive time. Trump and Kim are planning to meet by May, according to officials, and denuclearization will likely be the biggest topic on their agenda if they do meet. North Korea tested its biggest nuclear device to date last September.