A man poses for a pictures, as he transport logs on his bull-cart to make charcoal at La Campanera village, Nicaragua, May 22, 2015. Around 300 families live off the sale of charcoal in this area located in the dry corridor of Nicaragua. Friday marks World Environment Day. Picture taken May 22, 2015. REUTERS/Oswaldo Rivas

Richie Diehl team charges out of the chute over trucked-in snow at the 2015 ceremonial start of the Iditarod Trail Sled Dog race in downtown Anchorage, Alaska March 7, 2015. The timed portion of the race, which typically lasts nine days or longer, begins on Monday in Fairbanks, about 300 miles (482 km) away. Traditionally held in Willow, the timed start was moved to Fairbanks this year to accommodate an alternate trail selected after race officials deemed sections of the traditional path unsafe. REUTERS/Mark Meyer (UNITED STATES - Tags: SPORT ANIMALS SOCIETY)