Fresh out the oven: N. Korea has expanded a key solid-fuel missile facility in recent weeks, new satellite imagery shows, underscoring the challenge the U.S. faces as it tries to get N. Korea to denuclearize.@ArmsControlWonk @DaveSchmerler @planetlabshttps://t.co/EVavHTKTD9 pic.twitter.com/RAXiJI6A2I

— Jonathan Cheng (@JChengWSJ) July 1, 2018