sacrifice and duty, we return to our conversation with defense secretary mattis. we asked him about his concerns that one of the biggest challenges facing america today is its lack of unity. >> you mentioned in "the new yorker" you were worried about political, lack of political unity in america. >> well, you know, i am a, at west point where i am talking together, john, and you look at these young people who graduated today, over 900 of them, from all walks of life, every religion probably in america is represented, every state is represented. these people come together with an enthusiasm for protecting this experiment in democracy that we call america, and it takes people like, who have a fundamental respect for each other and a fundamental friendliness toward each other that i am worried is starting to slip away in this country. we still have it in the military. it is a diverse force. it is a force that can work together under the worst conditions and i just hope we can find our...

picking up the tempo against isis in all theaters. we sat down with defense secretary james mattis at the u.s. military academy at west point saturday and asked him about the new strategy. >> our strategy right now is to accelerate the campaign against isis, it is a threat to all civil lized nations and the bottom line is, we are going to move in an accelerated and reinforced manner, throw them on their back foot. we have already shifted from attrition tactics where we shove them from one position to another in iraq and syria to if an inside population tactics where we surround them, our intention is that the foreign fighters do not survive the fight to return home to north africa, to europe, to america, to asia, to africa, we are not going to allow them to do so. we are going to stop them there and take apart the caliphate. >> dickerson: explain what it means to be moving in an annihilation posture as opposed to attrition. >> well, attrition is where you keep pushing them out of...