before we go, alan, professor, if i can get your final thoughts on this. >> i'd like to pick up on two somewhat different themes. one is the theme of peace. the truth is, history shows that no matter how heroic the pursuit of victory in war, it will not stop the deaths. wars always beget more wars. world war i was supposed to be the war to end all wars and many scores of millions of men and women have died in wars ever since then. the only way to avoid the death is to avoid war. presidents have said the hardest thing they can do is put americans in harm's way. in a sense, that's true. but history also shows maybe the hardest thing they can do is avoid war. the second point i want to make. >> i'm so sorry to cut you off. we're running out of time. there's one tribute we would like to make to some of those that have fallen. stay with us for one moment. i look at the brave men and