A Marine, left, provides security while Navy Petty Officer 2nd Class Victor Green and his dog, Koko, a military working dog, look for an improvised explosive devices during training at Camp Lemonnier, Djibouti, June 9, 2017. Green is a military working dog handler assigned to Combined Joint Task Force-Horn of Africa. The unit works to counter violent extremist organization operations, support aligned regional efforts, and protect U.S. interests in Djibouti. Air Force photo by Staff Sgt. Lindsay Cryer