During his deployments to Afghanistan, Leary saw things he could never unsee. His fellow service members and civilians entered his operating room severely wounded, and some, after the surgical team worked tirelessly to save them, unfortunately returned home in a flag draped coffin. These experiences continued to haunt him after his return home and he was diagnosed with post-traumatic stress disorder.
In 2010, during his second deployment to Afghanistan, Leary was rattled by a mortar while cleaning the operating room after a patient. He hit his head and was knocked unconscious. Later, he learned that the base fell under attack by the Taliban. The incident resulted in a mild traumatic brain injury and chronic post-traumatic headaches.
