Sahara desert, Libya-Chad, November/December 2004..Every week, a convoy of 40 privately owned Libyan trucks loaded by the WFP with about 1000 metric tons of western food aid cross 2500 km of deep desert across Libya and Chad to reach more than 200 000 refugees from Darfur in camps near the Sudanese border. Crossing a soft sand area near Djebel Alweinat.