now, most of russia's war heads are not currently on missile bases. just over 1,400 are deployable at the moment. these are intercontinental ballistic missiles, submarines and bombers. but what russia's president would really use them? he thinks putin is bluffing. >> he reminded everyone he's got nuclear weapons, which starts people off being worried. >> reporter: it is designed to change the dynamics of the war. >> somebody like that does become more dangerous when he's in a corner. it is most unlikely. i don't want to learn people necessarily. the probability is low but not