Roki, 31st Security Forces Squadron military working dog, licks his retirement certificate during an MWD retirement ceremony Jan. 22, 2016, at Aviano Air Base, Italy. Soma, Treesje and Roki retired from service, received a certificate and were adopted into a new family. Department of Defense MWD’s are trained at Lackland Air Force Base in San Antonio, Texas. (U.S. Air Force by Staff Sgt. Evelyn Chavez)