Competitors stretch at the bivouac after stage 1 of the 33rd edition of the Marathon des Sables between Timgaline and Ouest Aguenoun N'Oumerhiout in the southern Moroccan Sahara desert on April 8, 2018. The 33rd edition of the marathon is a live stage 250 kilometre race through a formidable landscape in one of the world's most inhospitable climates. / AFP PHOTO / JEAN-PHILIPPE KSIAZEK