A competitor crosses the erg Znaigui during the second stage of the 26rd edition of the "Marathon des Sables", on April 4, 2011, some 300 Kilometers, South of Ouarzazate in Morocco. The marathon is ... more 
A competitor crosses the erg Znaigui during the second stage of the 26rd edition of the "Marathon des Sables", on April 4, 2011, some 300 Kilometers, South of Ouarzazate in Morocco. The marathon is considered one of the hardest in the world, with 900 participants having to walk 250 kms (150 miles) for 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
Mon, Apr 4, 2011 2:00 PM EDT