Members of the federal police carry a Nazi statue at the Interpol headquarters in Buenos Aires, Argentina, Friday, June 16, 2017. In a hidden room in a house near Argentina's capital, police discovered on June 8th the biggest collection of Nazi artifacts in the country's history. Authorities say they suspect they are originals that belonged to high-ranking Nazis in Germany during World War II. (Photo by Natacha Pisarenko/AP Photo)

Girls enjoy nice weather at a park in front of the Pothonggang Department Store in central Pyongyang October 11, 2015. (Photo by Damir Sagolj/Reuters)

Actress Olga Kurylenko poses for a photograph at the British Academy of Film and Arts (BAFTA) awards ceremony at the Royal Opera House in London February 16, 2014. (Photo by Suzanne Plunkett/Reuters)

Afghan security stands guard as a tractor eradicates a field of young poppy plants May 25, 2011, in Argu District, Badakshan, Afghanistan. (Photo by Paula Bronstein/Getty Images)

People take photographs of waves crashing against the harbour wall on January 3, 2012 in Porthcawl, Wales. (Photo by Matt Cardy/Getty Images)

Throughout the course of the long war in Afghanistan, Coalition troops have relied on thousands of military working dogs to help keep them safe, and make their jobs easier. The dogs are trained to detect explosives, to find illegal drugs, to search for missing comrades, or target enemy combatants. Not only are they active on the front lines, but behind the lines they serve as therapy dogs, service dogs, and loyal companions. They also share the same risks as the ground troops, suffering injuries and sometimes death on the battlefields. Gathered here are images of these dogs and their handlers in Afghanistan and back home, from over the past several years, part of the ongoing series here on Afghanistan.

An Acehnese female police officer wear a hijab on duty in the street in Banda Aceh, Indonesia, 27 March 2015. Indonesia National Police officially issued a regulation allowing female police officer to wear the Islamic hijab (heads craft) as a part of their uniform. Indonesia is the biggest Muslim population in the world. (Photo by Hotli Simanjuntak/EPA)

Internationally acclaimed German three-dimensional artist Manfred Stader adds finishing touches to his artwork in Cape Town, South Africa on 21 November 2010. Stader created this masterpiece to celebrate the opening of Speedo's first dedicated concept store in Africa. (Photo by Foto24/Gallo Images/Getty Images)