second turniqtte on him and tried to get a rapid set of vitals, y know heart rate, spiration, pulse mmetry. asuch as a could get inaybe a six or seven-minute flight. >> reporter: the next night line came. serious back injuries. little inforti. frequent don't know what to expect as theypproach the poinof injury. >> right now with three vehicles the road. 0931. would like you to ld on the road, if ssible. 've blocked off a section with two humvees. about 100 meters long where there's traffic. >> there are times when i see my guys g out and i wonder is that ing to behe last time i see him. sometimes i out and i think is ts is last time anyones going to see me? sometimes youo out and y know it's ahoist mission and there are bad guys runng around outthere. andou wonder, wha --hat will they say to my hildren? you know, are tey going t get that knock on the door? and itdoes weigh heavily you sometimes but what you dos you focus and you do ur job and u talk to your friends. >> there e peopleut there who want to kill us and tey wanto killy pple, my countrymen. i feel iave a peonal responsibility. i