escalations from north korea with ballistic missile tests and nuclear tests and ultimately hydrogen bomb tests, i think today we saw the full response from the united states. here in seoul speaking to parliament giving a very harsh speech telling north korea's leadership not to miscalculate the u.s. intentions. and president trump stressed that he's coming here backed up by a lot of fire power. to see first hand the front line of this long simmering conflict, we accompanied f-16 pilot captain kyle moses on a training mission to the north korean border. >> here we go. we shot up through the clouds vertically. the distance between south and north korea is very short. at just shy of the speed of sound, we were there in minutes. >> we're about seven miles from the north korean border right