An analysis of satellite images shows increased activity at North Korea 's nuclear site . In the statement Tuesday , North Korea denounced as `` absolutely intolerable '' a declaration from the Group of 8 leaders over the weekend , which stated that Pyongyang faces more isolation if it continues its pursuit of a nuclear program . It says it is ` ` " and bolster '' its nuclear program . It says it is acting in self - defense to ` ` the hostile policy of the U.S. '' Western governments have warned North Korea it faces further isolation over its nuclear program .
An analysis of satellite images shows increased activity at North Korea 's nuclear site . It says it is ` ` " and bolster '' its nuclear program . It says it is acting in self - defense to ` ` the hostile policy of the U.S. '' Western governments have warned North Korea it faces further isolation over its nuclear program .