remodel. i had no idea how i was going to pay for it. dan just said we're going to take care of it. >> we remodelled that home and i realized this is not an isolated case. so i went back to my builder buddies and said we've got to do something. we build homes for returning heroes from iraq and afghanistan. the houses are mortgage-free. it changes the whole family's life. it gives them just a new start so that they can move forward. these young men and women are doing this for you and me. how can i not help them? >> you know, so far dan and his organization have completed homes for four veterans and begun construction on five more. to see how dan found his inspiration or to nominate someone you think is changing the world go to cnn.com/heroes. right now, there's a nurse saving a life in baltimore. 20 minutes later, she'll bring one into the world in seattle.