>> primarily, personally, my colleague and friend tim hetherington got killed in somalia. he was covering the humanitarian disaster. nato action stop the genocide in the sarajevo province in the early 1990's. tim was killed by a mortar shell fired by a military unit. that absolutely gutted me and has made this project look different, actually. tavis: you mean what, exactly? >> we did this together. we had this incredibly close collaboration. "restrepo" was our movie, and suddenly he is gone and it is my movie. at one of the things i worry about is will i be able to make decisions about the future of this movie and the material and the best possible way? i no longer have my friend to consult with. i would talk to him all the time. it is actually intimidating, how can i do justice to his memory with this project? tavis: does his death say anything different to you about work? >-- about war? >> absolutely. i got an e-mail from a vietnam veteran who said he was so sore about him, i have to tell you this, you guys with your books and your movie came close to understanding what w