afghanistan, coming home may offer little rest for the weary. but this week's cnn hero is helping rebuild their lives. dan wallrath spends his retirement giving injured soldiers a place to call home. >> baghdad ended up being a hell of a ride. i suffered a severe blast injury. my life came to a complete halt. how are you doing? how is everything? you look sharp today. >> thank you. >> i've been building custom homes for 30 years. one of the most important things for a family is a home. i want you to read the sign for me. >> future home of alexander reyes, united states army. >> oh my god. >> giving these people a home means the world. >> thank you. that's all i can say. >> my name is dan wallrath. i had a friend of mine call me, a friend of his, his son had been injured in iraq. >> this is the day after he