When former US infantryman Luke was seriously injured in combat, his entire life changed. Fortunately, the vet, who suffers from PTSD and insomnia, met a young squirrel monkey, named Ollie, at a sanctuary and immediately decided to adopt him. Since then, Ollie has helped Luke become more sociable and less anxious, and in return, the tiny animal receives all the love in the world. The pair in Charlotte, North Carolina, have amassed a popular following on YouTube, where the adorable duo inspire many to live life to the fullest.