>> let's listen to leon panetta in brussels yesterday. >> this is not who we are. it's certainly not who we represent when it comes to the great majority of men and women in uniform, who are serving there. i expect that the matter will be fully investigated. >> now, he may say that, that this is going to be fully investigated, that this is not who we are. this is not what we're about but it comes on the heels of videos of marines urinating on dead bodies and the massacre that afghanistan is still dealing with allegedly, one u.s. soldier murdering 16 -- i think it was 16 afghan civilians. when you take all of this together, can this resonate the fact that the u.s. is condemning what is happening here and say it's an isolated incident? >> reporter: they are, i think in the eyes of many, become a troubling trend, breakdown of discipline. this is the fourth big investigation the u.s. has said it's conducting so far this year after the misconduct you've described. investigations themselves aren't going to quiet afghans. there's not been this immediate backlash of violen