A donkey is loaded onto a train filled with iron ore in the West African country of Mauritania. Photographer George Popescu rode the train last fall -- a 40-hour round-trip journey through the Sahara desert.
A truck transports iron ore at a mine in Zouérat, Mauritania.
Nonticketed passengers ride the train on top of iron ore. It's free for them to do so, but they have to endure dust, sun and high temperatures.
Ghassem, a train mechanic, poses for a portrait in his Jim Morrison shirt.
A child sits on luggage as he waits to board a passenger car.
Wagons are loaded with livestock before the start of a journey.
A passenger looks outside at the end of a 20-hour trip from Zouérat to Nouadhibou.
A child looks at his camera while his companions rest in the coach kitchen area.
Two young sisters pose for a portrait during their travels.
Cars wait on the outskirts of Zouérat to pick up passengers after the train ride.
People exit the train after arriving at the Nouadhibou harbor.