. >> david caldwell's son robert was just 18 when he started, he'd asked his dad for a check to cover the initial training. >> that's been the hardest thing for me to bear, that, that i helped him along. maybe if i had guided him into something else, you know, i wouldn't be talking to you today, you know. >> the last time david saw his son was two nights before the fire. >> they were getting into the car, before he closed the door i waved to him and said robert don't be a hero. and he just smiled backed to me. that's the last thing i said to him. >> david turbyfill also lost his son travis. a metalworker, he's honoring the fallen firefighters in the best way he can. >> i did this design tuesday evening, after they perished. >> he says he could barely get through engraving travis' name. >> that's when it first hit me that they were gone because their names were down. there was no turning back. >> one letter at a time, he says, he came to terms with his loss. >> you can see a yellow flame as the letters are being cut. so, they died in fire and they are reborn in fire. >> david's hope is