CHORNOBYL, UKRAINE – AUGUST 17: Marie-Louise Chenery, who is from San Diego, California, and is a volunteer with The Dogs of CHORNOBYL initiative, tends to stray puppies near the Chernobyl nuclear power plant as the abandoned construction site of reactors five and six stands behind on August 17, 2017 near Chornobyl, Ukraine. An estimated 900 stray dogs live in the CHORNOBYL exclusion zone, many of them likely the descendants of dogs left behind following the mass evacuation of residents in the aftermath of the 1986 nuclear disaster at CHORNOBYL. Volunteers, including veterinarians and radiation experts from around the world, are participating in an initiative called The Dogs of CHORNOBYL, launched by the non-profit Clean Futures Fund. Participants capture the dogs, study their radiation exposure, vaccinate them against parasites and diseases including rabies, tag the dogs and release them again into the exclusion zone. Some dogs are also being outfitted with special collars equipped with radiation sensors and GPS receivers in order to map radiation levels across the zone. (Photo by Sean Gallup/Getty Images)