. >> narrator: ryan krebbs, nicknamed "doc," was third platoon's combat medic. >> yeah, i just want, like, vines and, like, overgrowth drooping off the stars. >> were you thinking more, like, jungley or more like... like ivy...? >> narrator: krebbs was first to the scene when a car bomb plowed into a platoon checkpoint on veterans day, 2004. >> i'm still having nightmares, flashbacks. there's nothing but smoke and dust everywhere. and i remember looking over to the left and seeing two kids completely just torn apart. and i kept running through the smoke, and the first guy i saw was, you know, sergeant huey covered in blood. his uniform was just covered in blood. and that's about all i remember of that incident. >> narrator: seven soldiers from third platoon were badly wounded. sergeant huey was in the worst shape. doc krebbs, tried to save his life, but shrapnel had severed a major artery. >> people don't die like they die in the movies. they turn very pale. when they actually do die, there's, like, a look in their eyes. you can tell that there's nothing behind their eyes anymore. it'