out, your coverage of the oklahoma city, you cover the event but you also covered the trial of timothy mcveighas i did. i was covering the white house during 9/11 and a force among other things you did an amazing hour documentary or maybe it was two on the one-year anniversary of 9/11. and i've been thinking a lot as we, next year will be the 25th anniversary of the oklahoma city bombing and so many people, so many americans don't think about it in its importance because it was displaced by9/11 but in meaningful ways , both those events taken together change america, change our politics, change journalism in some ways and as you been reflective about the response to those events, particularly 9/11, i wonder what you think those changes were and have been in this country? >> david, so much time has passed as you just mentioned it occurred to me recently that it's very likely that we have young troops hiding in afghanistan today who were not born on 911. the reason that we're in afghanistan . you certainly have a lot of people in the military today, a lot of young people in every walk of life wh