French firefighters walk up stairs as they work to extinguish the fire that broke-out overnight at the...
French firefighters of Paris Fire Brigade (BSPP) walk up stairs as they work to extinguish the fire that broke-out overnight at the Cite des Sciences et Industries Museum at La Villette, in Paris, France, August 20, 2015. More than 10,000 square meters were hit by the fire that started in an area that was under construction. REUTERS/Christian Hartmann