U.S. Marine Gunnery Sgt. Christopher Willingham is photographed with Lucca on Dec. 27, 2012. Lucca was awarded for completing 400 missions even after losing one of her legs while searching for homemade bombs in Afghanistan.
Gary Friedman—LA Times via Getty Images
August 25, 2016 10:37 AM EDT

There are endless reasons why dogs are considered man’s best friend. The tail-wagging, four-legged friends fetch the mail, keep the bed warm, greet you at the door and provide unconditional love and loyalty. And they’re living proof that not all heroes are human. In honor of National Dog Day—celebrated every year on Aug. 26–here are 10 canines to celebrate for their bravery, dedication and devotion.

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