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.
//www.bbc.co.uk/news/science-environment-10903004 (BBC)
//www.time.com/time/health/article/0,8599,2009257,00.html ("TIME")
