U.S. military combat dog Layka was shot four times at close range while in combat in Afghanistan. Still, she didn’t falter and subdued the attacker thereby saving her handler and the other members of the team. After serving, Staff Sgt. Julian McDonald couldn’t just let Layka go. He had to return the favor for saving his life, and fought to adopt her. Even if she only had three legs. 

The National Geographic tells the touching story in this video