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Every so often I get to report on happenings outside the science/technology/space/environment beat, and it's usually for CBS Sunday Morning. Last week I got the chance to follow a dozen young people as they traveled along the Colorado River in the Grand Canyon. Starting at Lee's Ferry outside Flagstaff, AZ, we went through 89 miles of river rapids and canyon hikes to witness their adventure firsthand. On the surface, it sounds like many other summer vacations. But there's a catch -- half of these young people are visually impaired and legally blind.

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