making sure the crew is good to go. >> last week the u.s. navy conducted a round of joint exercises with the rock, their allies in south korea. it is essential if there were an emergency tonight that these two nations speak the same language. militarily speaking. >> we are out operating constantly in seventh fleet, regardless of the current situation that's going on politically or what heightened tension may be perceived or going on. we rely on the inner operability of working with our close allies like the japanese or like we're doing now now with the koreans to fold into any eventuality. >> despite the unpredictability in this region the sense of mission among these sailors is strong. so how will president trump's upcoming trip here to south korea resonate among the men and women on the front lines? >> i think that the president's been very clear about using all the levers, all the tools available to us, to convince the