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While millions of people might dream about space travel, with the exacting requirements often expected of astronauts some disabled people might have counted themselves out...until now.

Mission: AstroAccess - a crew of disabled scientists, students and artists based in America - has just launched to make space travel accessible for all the right reasons.

Sina Bahram, who is blind, is one member of the crew. He describes floating in zero-gravity as "sheer joy" and something out of Mary Poppins.