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United States astronauts Douglas H. Wheelock and Tracy Caldwell Dyson fail on the International Space Station (ISS)'s longest spacewalk and sixth longest spacewalk to repair a cooling system, which means two more spacewalks are now required. [https:--www.bbc.co.uk-news-science-environment-10903004 (BBC)] [http:--www.time.com-time-health-article-0,8599,2009257,00.html ("TIME")]date=August 2019


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