To understand a person, walk a mile in his shoes. But if that person is an Appalachian Trail (AT) thru-hiker, you’ll have to walk several hundred miles. “It’s not until about mile 500 that they start to listen,” said North American Mission Board (NAMB) Mission Service Corps (MSC) missionary Suzy Miles. “Before that, they’re superheroes.” MSC missionaries Craig and Suzy…