left is a south korea building and on the right is a north korean mockup of the building. two satellite imaging experts we spoke to say it looks like the military headquarters seen here. >> i think they want to basically practice or at least study ways of attacking it or assaulting it or doing something in a military sense. >> reporter: the cia declined to comment on the new pictures, but a pentagon official tells cnn it would not be unusual to see north korean training mockup it of buildings like the south korean military headquarters. two years ago north korea staged a simulated attack on a mockup of south korea's blue house, that country's equivalent of the white house, with artillery barrages and camouflaged commandos parachuting in. since that time kim jong-un has made peace overtures to south korea and to president trump. is this mockup and a possible mock attack an indication that kim is about to give up on die plo ploem -- diplomacy? >> they're not going to