Competitors settle down in the bivouac on April 7, 2018, on the eve of the start of the 33rd edition of the Marathon des Sables in the southern Moroccan Sahara desert in Timgaline, near Tinghir. 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