Transcript for Bat kid is now cancer-free

??? Finally tonight, America strong. The little boy, the superhero, who saved his city. And what we've learned tonight. A mom and dad and their little boy dressed up as Batman. They were nervous. We were worried, because he is a shy boy, but he put on that suit and he's just like, let's go! Reporter: He was ready. Then a thumb's up from the batmobile, shy no more. Those aerials from above. Batkid saving the day in San Francisco, smiling faces lining office windows for blocks. And standing beside the mayor -- Thank you, batkid! Reporter: Batkid suddenly realizing his power. Just watch. We loved meeting miles at the time, giving him the high five. All right. And tonight, five years to the day after that city came together, miles' family sending us new photos. Now, in remission. They say, no sign of the cancer. He's 10, in fifth grade. And a new study out just this week showing children who have been apart of make a wish are two and a half times more likely to have fewer unplanned trips to the hospital afterward. They believe it's proof that love and kindness from a community can also help a child heal. And miles' mom tonight telling us, "We have so thankful for our positive experience with make a wish. It's about organization that shines a light on children and families when nothing else can." And that's something we all can salute tonight. No question about that. We love miles. And make a wish, for what they do.

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