Blind man who uses echolocation to help him “see”

3 links, the first to a news article, the second to a youtube video, and the third to a chapter in a podcast, This American Life, about this amazing man.

http://www.cnn.com/2011/11/09/tech/innovation/daniel-kish-poptech-echolocation/

http://www.thisamericanlife.org/radio-archives/episode/544/batman?act=1

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