North Korea has begun dismantling key facilities at the Sohae Satellite Launching Station, which is used to develop engines for ballistic missiles.
The American experts have obtained satellite images.
The July 20 images showed work at the Sohae Satellite Launching Station to dismantle a building used to assemble space-launch vehicles and a nearby rocket engine test stand used to develop liquid-fuel engines for ballistic missiles and space-launch vehicles
Reportedly this is a first step toward fulfilling a pledge made to U.S. President Donald Trump, a Washington-based think tank said on Monday.