Man's best friend
Kai, a service dog, lies on the lap of Staff Sgt. August O'Niell during an Air Force wounded, ill or injured warrior sitting volleyball practice Nov. 18, 2014, at Joint Base Andrews, Md. O'Niell, a pararescueman, was wounded in July 2011 during a deployment to Afghanistan. (U.S. Air Force photo/Tech. Sgt. Brian Ferguson)