French Chasseurs Alpins (Alpine Hunters) soldiers and legionnaires walk prior a ceremony at the Invalides monument in Paris to pay tribute to 13 French soldiers who died in a helicopter collision in Mali. AFP / ludovic MARIN

Competitors take part in the kayak race as part of the "Raid des Alizes", an exclusively all-female multi sport competition on the French Caribbean island of Martinique. AFP / ANNE-CHRISTINE POUJOULAT

A woman competes in the mountain bike race as part of the "Raid des Alizes", an exclusively all-female multi sport competition on the French Caribbean island of Martinique. AFP / ANNE-CHRISTINE POUJOULAT

A youth plays over foamy discharge, caused by pollutants, as it mixes with the surf at a beach in Chennai. AFP / Arun SANKAR

A woman prepares to remove rainwater from her house after heavy rains in Chennai, India. REUTERS/P. Ravikumar

An enthusiast of winter swimming takes a dip in icy water, with buildings of Chinese border city Heihe seen in the background across the frozen Amur River in Blagoveshchensk, in Amur region, Russia. REUTERS/Maxim Shemetov