San Francisco, a charity and city residents came together to let a five year old leukemia sufferer play crime fighting 'Batkid' and fulfil a wish to be a superhero for a day.
His day started with a television appeal from the city's police chief, Greg Suhr, and ended with him aiding a grown up Batman stop Gotham City's most fiendish criminals.
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Miles, also known as BatKid and Batman after they arrest the Riddler.
Miles was diagnosed with leukemia when he was 18 months old, but ended treatments in June and is in remission.
Miles' father Nick Scott thanked the crowd, organisers and the city.
San Francisco Mayor Ed Lee later proclaimed November 15 to be 'Batkid Day Forever'.
The US President, Barack Obama, said in a message: ' Way to go, Miles! Way to save Gotham!'.