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NASA Commentator Lori Meggs at the Marshall Space Flight Center talks to Dan Barstow, the principal investigator for Windows on Earth on the International Space Station. Windows on Earth is a suite of software tools to help students, scientists and astronauts explore Earth from space. The software provides a little help to astronauts in snapping the best photographs as they must key in on a city or landmark and get a picture, while traveling 17,500 mph.