of their programs within a year. >> reporter: bolton's comments come as north korea threatens a christmas gift to the u.s. that is left u.s. intelligence and the military looking for signs of what the north koreans are planning. new images show expanded efforts at one plant for production of long range intercontinental ballistic missiles. at the launching station, the u.s. is look for signs of more advanced engine missile tests or launch of a long range missile that could threaten the u.s. there arine worries of an underground nuclear test even though these test tunnels were supposedly destroyed by kim. a source familiar with the north korean leadership current thinking tells cnn kim is expected to take a wait-and-see approach as he assesses trump's political vulnerability. >> he sees trump as being weakened by impeachment. he thinks that the united states