Airman 1st Class Jason Fischman, 83rd Expeditionary Rescue Squadron pararescueman, hoists a U.S. Army tactical explosive detection dog into a HH-60G Pave Hawk helicopter during a joint rescue training scenario at Bagram Air Field, Afghanistan, on June 21, 2013. (USAF/Staff Sgt. Stephenie Wade)




Basco, a patrol explosive detector dog with the 627 Security Forces Squadron, and his handler, Sergeant Matthew Templet, search for explosives in an abandoned house in Haji Ghaffar village during a clearance patrol in Zari district of Kandahar province on December 27, 2010. (Behrouz Mehri/AFP/Getty Images)




U.S. Marines from 1st Battalion, 5th Marines, Regimental Combat Team 8, carry Drak, an injured bomb-tracking dog, to an awaiting helicopter at Forward Operating Base Jackson on September 8, 2011. Both Drak and his handler, Sgt Kenneth A. Fischer, were flown out of the country for surgery and recovery. Eventually, in line with military custom, Fischer will adopt Drak and take him home. (USMC/Cpl. Logan W. Pierce)




Paris, a coalition force military working dog, stands in a tactical vehicle in Farah province, on November 24, 2012. (USMC/Sgt. Pete Thibodeau)




US Army Specialist Justin Coletti of the Afghanistan K-9 combat tracker team rests with Dasty, a Belgian Malinois, at an airfield on Forward Operating Base Pasab following a five-hour overnight air assault mission with Bravo Company, 2-87 Infantry Battalion, in Kandahar province on August 15, 2011. Dasty who has a rank of a Sergeant, is a military working dog trained to patrol and locate a targeted individual. (Romeo Gacad/AFP/Getty Images)




US Army Staff Sergeant Lindsey Thompson (right) of US Forces Afghanistan K-9 unit looks at Mayo, a German Shepherd as they prepare to board a convoy of armored vehicles from Forward Operating Base Pasab on an overnight ground assault mission in Kandahar province on August 14, 2011. Mayo who has a rank of Technical Sergeant is a military working dog trained for patrol and find bombs and improvised explosive devices. (Romeo Gacad/AFP/Getty Images)




U.S. Marine Corps Lance Cpl. Joseph Nunez and Viky, an improvised explosive device detection dog, both attached to Fox Company, 2nd Battalion, 2nd Marine Regiment, search the perimeter of a compound for hidden threats during Operation Grizzly in Helmand province on July 18, 2013. (USMC/Cpl. Alejandro Pena)





U.S. Army Spc. Mike Ballard stands with Apollo, his service dog, during an archery shooting session, on May 17, 2012, in Puyallup, Washington. Ballard says his dog helps him get through the worst symptoms of the post-traumatic stress disorder that are a remnant of an explosion in Afghanistan that ended his career as an Army medic. (AP Photo/Ted S. Warren)




A military working dog looks at the camera as US Marines from 1st Battalion, 8th Marines clean their weapons before a patrol outside new Mirage base, on the south of Musa Qala District, Helmand province, on February 4, 2011. (Dmitry Kostyukov/AFP/Getty Images)




U.S. Marine Cpl. Kyle Click, a 22-year-old improvised explosive device detection dog handler with 3rd Platoon, Kilo Company, 3rd Battalion, 3rd Marine Regiment, shares a moment with his dog Windy while waiting to resume a security patrol on February 27, 2012. (USMC/Cpl. Reece Lodder)




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. Emerald Warrior is an annual two-week joint/combined tactical exercise sponsored by U.S. Special Operations Command designed to leverage lessons learned from operations in Afghanistan and Iraq. (USAF/Tech. Sgt. Manuel J. Martinez)




A coalition security force member stands watch with his loyal partner during a mission that arrested a Haqqani facilitator in Pul-e 'Alam district, Logar province, on January 28, 2013. (U.S Army/Pfc. Coty M. Kuhn)




A soldier, part of the NATO forces, carries a sniffing dog after a gun battle in Kabul, Afghanistan, in this April 16, 2012 photo. A brazen, 18-hour Taliban attack on the Afghan capital ended early Monday when insurgents who had holed up overnight in two buildings were overcome by heavy gunfire from Afghan-led forces and pre-dawn air assaults from U.S.-led coalition helicopters. (AP Photo/Musadeq Sadeq)




Marine Sgt. Ross Gundlach, of Madison, Wisconsin, gets a kiss from Casey, a four-year-old yellow labrador that he worked with while deployed in Afghanistan, as the two are reunited during a surprise ceremony at the Statehouse in Des Moines, Iowa, on May 17, 2013. Gundlach thought he was traveling to the Iowa Capitol to tell state officials why he should take ownership of the dog, which has been working for the state fire marshal's office. Gundlach didn't realize officials already had made arrangements to get another dog for explosives detection. (AP Photo/Charlie Neibergall)




An Afghan student listens to the heartbeat of a dog during Operation Outreach Afghanistan's tour of the Camp Phoenix veterinary clinic. (US Army National Guard/Capt. Mike Thompson)




USMC military police attached to 1st Battalion, 6th regiment, Charlie company relaxes with bomb sniffer dog corporal "Buttom" in Huskers camp on the outskirts of Marjah in central Helmand on January 25, 2010. (Christophe Simon/AFP/Getty Images)




Service members pet the 98th Medical Detachment Combat Stress Control combat stress dog, Major Eden, at Bagram Air Field on January 21, 2014. (USAF/Senior Airman Kayla Newman)




Captain Katie Kopp from 2nd Battalion, 12th Infantry Regiment of the 4th Brigade Combat Team, talks to therapy dog Hank during Hank's visit to Combat Outpost Nangalam in the Pech River Valley of Afghanistan's Kunar Province on July 3, 2012. Hank is the only Boston Terrier therapy dog deployed in this region to interact with soldiers as a stress relief. (Reuters/Lucas Jackson)




Navy Petty Officer 2nd Class Ryan Lee, master at arms, and Petty Officer 1st Class Valdo, working dog, sleep on a hospital floor in Kandahar. Valdo and Lee both were wounded by shrapnel in a rocket propelled grenade attach in Bala Murghab District, Badghis Province, on April 4, 2011. Both Lee and Valdo were awarded Purple Heart medals. Valdo fully recovered after five surgeries, served another year, then retired and now lives with Lee in New Jersey. (USAF/Master Sgt. Kevin Wallace)




U.S. Marine Sgt. Maj. Lisa K. Nilsson, sergeant major, 2nd Marine Aircraft Wing, pets a military working dog at Patrol Base Boldak, Helmand Province, on March 6, 2013. (USMC/Cpl. Ashley E. Santy)