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A team member from South African research station, SANAE IV, helps unwrap the balloon from its protective yellow plastic cover just prior to inflation. Credit: NASA/Goddard/BARREL/Nicky Knox Read more: <a href="http://www.nasa.gov/content/goddard/nasas-barrel-returns-successful-from-antarctica" rel="nofollow">www.nasa.gov/content/goddard/nasas-barrel-returns-success...</a> -- Three months, 20 balloons, and one very successful campaign. The team for NASA's BARREL – short for Balloon Array for Radiation belt Relativistic Electron Losses -- mission returned from Antarctica in March 2014. …