AGUA PRIETA, Mexico — It was Thanksgiving Day in 1987, and Gil Gillenwater sat comfortably in his home, preparing to stuff himself with food, drink beer and watch football.
But that year, he decided he’d had enough of the uniquely American holiday routine. It was like watching the movie “Groundhog Day,” he said — like living the same day over and over again. He grew uncomfortable in his own comfort.
“How many times can you do that when you know that a mere four-hour drive from your home in Scottsdale, Arizona, there are people without the basic needs of the human condition?” he asked…