Jose Luis Flores, an arriero or muleteer rests at his house after a harvest in Tequila, Jalisco, Mexico, April 13, 2018. "I helped my dad for 20 years and I love it," Flores said. "No one can replace us, not even a machine. My mules can get past any cliff or difficult path." He hopes to pass down his trade to his four children. "I think I'm going to buy more mules. This is a family business now," he said. REUTERS/Carlos Jasso SEARCH "JASSO TEQUILA" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES.