North Korea is unlikely to be ready to stage a nuclear test timed to coincide with US President Barack Obama’s visit to Asia, a think tank said Wednesday based on its assessment of satellite imagery. North Korea continually works on improving testing at its Punggye-ri site. Satellite imagery analyzed by 38North, part of Johns Hopkins University, said that while there had been a pickup in activity, there were few signs of an imminent test. “Recent operations at Punggye-ri have not reached the high level of intensity—in terms of vehicle, personnel and equipment movement—that occurred in the weeks prior to past detonations,” it said.—Reuters