North Korea’s pursuit of nuclear weapons technology has been well demonstrated so far this year, with January’s nuclear test and numerous launches of missiles designed to deliver such weapons.

But even as Kim Jong Un’s regime presses ahead with its nuclear program, it is investing considerable resources in upgrading its conventional facilities, according to satellite imagery.

“Lots of people say that if they have a nuclear deterrent, they won’t need conventional weapons,” said Curtis Melvin, a researcher at the U.S.-Korea Institute at Johns Hopkins University who has an encyclopedic knowledge of North Korea’s geography. “But under the Kim Jong Un era, there has been a big increase in spending on the economic and conventional military side.” […]