Guy I flew with years back was a butter-bar Marine flying supplies into Khe Sanh. They hauled ammo and explosives in, taking fire the whole time. They off-loaded the ammo and supplies and uploaded wounded. When they lifted off, they were taking heavy fire from VC right over the fence.
His co-pilot took rounds heading out and passed out en route. Landing at their base, Dave was telling them to get him loaded and gassed to go back. A crew chief outside gave him the "slit throat" sign language and Dave shut down.
His copter had so many bullet holes in it that it was totaled. His co-pilot died later of his injuries. When you ask Dave how if felt to be doing that kind of work under those conditions he responds simply, "I was young and stupid." For his actions, Dave received the Silver Star.