A U.S. Army soldier with the 10th Special Forces Group and his military working dog jump off the ramp of a CH-47 Chinook helicopter from the 160th Special Operations Aviation Regiment during water training over the Gulf of Mexico as part of exercise Emerald Warrior 2011 on March 1, 2011. (Photo by Tech. Sgt. Manuel J. Martinez/U.S. Air Force)





Indian army commandos with their dogs perform during a show at a parade ground in Secunderabad, the twin city of Hyderabad on July 14, 2013, on the eve of the diamond Jubilee celebrations of The Military College of Electronics and Mechanical Engineering (MCEME). (Photo by Noah Seelam/AFP Photo)





A Belarussian military dog rides a platform being held by a group of soldiers carrying it above their heads in Minsk on May 19, 2009 during the country's annual military expo and arms fair. (Photo by Viktor Drachev/AFP Photo)





Soldiers with dogs from the Armed Special Forces descend by rope from a helicopter during an anti-terror drill in Jakarta, 20 October 2003. (Photo by Bay Ismoyo/AFP Photo)





A masked dog of the paratroop regiment is pictured during a troop exercise on June 7, 2006 in Merzig, Germany. (Photo by Ralph Orlowski/Getty Images)





Members of the Brazilian Navy take part in a terrorist attack drill dealing with chemical weapons as part of the security measures for the upcoming FIFA Confederations Cup and World Youth Day, and the FIFA 2014 World Cup and 2016 Olympic Games, in Rio de Janeiro, Brazil, on May 27, 2013. (Photo by Vanderlei Almeida/AFP Photo)





A police dog bites the arm of a “suspect” during an anti-terrorism practice at the Tokyo shopping and business mall of Roppongi Hills on June 4, 2008. (Photo by Toshifumi Kitamura/AFP Photo)





Marines and their military working dog at special patrol insertion and extraction training at Stone Bay on Marine Corps Base Camp Lejeune, on N.C., September 23, 2015. (Photo by Lance Cpl. Austin A. Lewis/U.S. Marine Corps)





A U.S. Marine with Marine Raider Regiment, carries his multipurpose canine during special patrol insertion/extraction training at Stone Bay, Camp Lejeune, N.C., September 23, 2015. Marine Light Attack Helicopter Squadron 167 Marines flew from Marine Corps Air Station New River to assist MARSOC with the training. (Photo by Lance Cpl. Austin A. Lewis/U.S. Marine Corps)





A U.S. Marine and his multipurpose canine, both with Marine Raider Regiment, hang from a UH-1Y Huey assigned to Marine Light Attack Helicopter Squadron (HMLA) 167, during special patrol insertion/extraction training at Stone Bay, Camp Lejeune, N.C., September 23, 2015. (Photo by Lance Cpl. Austin A. Lewis/U.S. Marine Corps)





Lance Cpl. Michael Ray Evans, Jr., a dog handler with 3rd Platoon, India Company, 3rd Battalion, 6th Marine Regiment, gives water to his dog, Allie, while on a patrol in Marjah, Helmand province, Afghanistan, February 21, 2010. (Photo by Lance Cpl. Tommy Bellegarde/U.S. Marine Corps)





U.S. Air Force Staff Sgt. Jessie Johnson, 3rd Infantry Division military working dog handler, practices placement training with her dog, Chrach, April 24, 2013, at Forward Operation Base Pasab, Afghanistan. Chrach is trained to detect the odor of explosives. (Photo by Staff Sgt. Marleah Miller/U.S. Air Force)





Lithuanian soldiers provide a security escort for U.S. Army Sgt. Kara Yost, right, a military police dog handler with the 131st Military Working Dog Detachment, 615th Military Police Company, May 17, 2014, during the urban assault training part of Combined Resolve II at the Joint Multinational Readiness Center in Hohenfels, Germany. (Photo by Capt. John Farmer/U.S. Army)





Military working dog handler Sgt. Veronica Pruhs pushes herself as she lifts and stands up with her K-9 partner Jerry, resting on her shoulders during an obstacle course event in the 2015 Hawaiian Islands Working Dog Skills Challenge hosted by the 728th Military Police Battalion, 8th Military Police Brigade, 8th Theater Sustainment Command, July 27-31. (Photo by U.S. Army)





A military working dog takes down Air Force Senior Airman Melissa Goodhile, a military police trainee from Summit Hill, Pa. December 3, 2013 at the Defense Military Working Dog School at Lackland Air Force Base in San Antonio, Texas. (Photo by E.J. Hersom/Department of Defense)





Coba, a 3-year-old chocolate lab and tactical explosives detector dog, chews contently on a tennis ball as David Sheffer, her handler and a dog trainer with Vohne Liche Kennels in Denver, Ind., explains the capabilities of the dog at the National Training Center on Fort Irwin, Calif. (Photo by Sgt. Christopher M. Gaylord/U.S. Army)