. >> tony antonelli got a new kidney. the donor was his wife mary. or another donor. >> and findi a difficult. tony had only about five years to live. bad news for a man with 13 grandchildren. enter dan reynolds an army veteran who knows something about being down on his luck. he spent a few years living in a van. even so, he is known in this maryland neighborhood as the handyman with a heart of gold. after doing yard work last october dan thought tony looked pale and tired. >> i asked him if he was okay. and he said, that he, might have to go on dialysis, his kidney was failing him. and i said, i would be happy to give you a kidney. >> reporter: and he said, he would be honored. tony's reaction? stunned. >> i just started crying and saying, oh, my god. >> reporter: turns out they were a match and four weeks ago, they underwent successful surgery. did you have ar a moment when y thought why am i doing this? >> no, i sure didn't. >> reporter: do you consider him a hero? >> absolutely. >> reporter: they have another name for each other. >> blood brother

tony antonelli got a new kidney. the donor was his wife mary. r, it started to fail. >> sure enough, we had to look for another donor. >> reporter: finding a match is difficult. tony had only about five years to live. bad news for a man with 13 grandchildren. enter dan reynolds, an army veteran who knows something about being down on his luck. he spent a few years living in a van. even so, he's known in this maryland neighborhood as the handyman with a heart of gold. after doing some yard work last october, dan thought tony looked pale and tired. >> asked him if he was okay. he said that he had -- might have to go dialysis, his kidney was failing him. i said, i'll be happy to give you a kidney. >> reporter: in fact, he said he'd be honored. tony's reaction -- >> stunned. >> i started crying and say, oh, my god. >> reporter: it turns out they were a match, and four weeks ago they underwent successful surgery. did you ever have a moment when you thought why am i doing this? >> no. i sure didn't. >> reporter: you consider him a hero? >> absolutely.

. >> brennan: four years ago, tony antonelli got a new kidney. >> morning. >> brennan: the donor wase mary. unfortunately, last year, it started to fail. >> sure enough, we, you know, had to look for another donor. >> brennan: but finding a match is difficult. tony had only about five years to live. bad news for a man with 13 grandchildren. enter dan reynolds, an army heveteperantn akn fwhews yowea van. even so, he's known in this's ko marylandghborhood as the after doing some yard work last october, dan thought tony looked pale and tired. >> i asked him if he was okay, and he said that he had -- might have to go on dialysis, his kidney was failing him. i said, well, i will be happy to give you a kidney. >> brennan: in fact, he said he would be honored. tony's reaction. >> stunned. i started just crying and saying, oh, my god! >> brennan: turns out, they were a match, and, four weeks ago, they underwent successful surgery. did you ever have a moment where you thought why am i doing this? >> no, i sure didn't.re >> brennan: do you consider him a hero. >> absolutely. >> brennan: but to