Martinez is now 69, and he’s spent the last 16 years in Mexico. He is still Marine to his core. He works out in the dark each morning, before the rest of the town wakes. He pushes five sets of 55 crunches and runs the plaza of Progreso, Mexico, a hot and dusty border town of bars, pharmacies and street vendors. He only allows himself to drink on Saturdays, the night he goes out dancing. The rest of the week is work, home, and hard exercise, "in case I can be of service to the Marine Corps again,” he said.