A competitor walks during sunrise amongst the tents before the start of a new stage in the 33rd edition of Marathon des Sables, in the Sahara desert, near Merzouga, southern Morocco, Wednesday, April 13, 2018. Under a hot desert sun and with the desolation of the Sahara all around, about 1,000 competitors from 50 countries took part in this year's Marathon des Sables, or Marathon of the Sands. (AP Photo/Mosa'ab Elshamy)