Work on North Korea’s long-planned “space environmental test base” appeared to resume in recent months following a visit by leader Kim Jong Un to Pyongyang’s Satellite Control Center (SCC) next door in March, satellite imagery shows.

The renewed activity at the site is a sign that North Korea is serious about plans to improve its aerospace industry and launch multiple “military reconnaissance satellites” into space in the coming years.

While the DPRK may be able to utilize reconnaissance satellite imagery from its allies in China and Russia or commercial providers, one expert said