Competitors cross the dunes of Merzouga, the hightest of Morocco , some 300 kms south of Ouarzazate, during the 26th edition of the "Marathon des Sables" (The Desert Marathon), on April 3, 2011. The ... more 
Competitors cross the dunes of Merzouga, the hightest of Morocco , some 300 kms south of Ouarzazate, during the 26th edition of the "Marathon des Sables" (The Desert Marathon), on April 3, 2011. The 844 self-food sufficient participants walk 250 kms during seven days in the Moroccan Sahara. AFP PHOTO PIERRE VERDY (Photo credit should read PIERRE VERDY/AFP/Getty Images) less 
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Getty Images | Photo By PIERRE VERDY / AFP/Getty Images
Sun, Apr 3, 2011 2:26 PM EDT