A competitor runs on a dune, on April 10, 2013, during the 28th edition of the "Marathon des Sables", some 300 kms south of Ouarzazate. The 223,8 kms Desert Marathon is considered as the hardest in ... more 
A competitor runs on a dune, on April 10, 2013, during the 28th edition of the "Marathon des Sables", some 300 kms south of Ouarzazate. The 223,8 kms Desert Marathon is considered as the hardest in the world. About 1024 participants, from 45 nationalities and aged 20 to 76, have to walk during seven days in the Moroccan Sahara and carry all their equipment and food on their backs. AFP PHOTO / PIERRE VERDYPIERRE VERDY/AFP/Getty Images less 
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Getty Images | Photo By PIERRE VERDY / AFP/Getty Images
Wed, Apr 10, 2013 5:58 PM EDT