Three volunteers from Johnson City helped take medical care to three tiny villages in the mountain desert of northern Mexico last week. The three are members of the First United Methodist Church, who joined the mission trip with Misión de Candelilla of Fredericksburg. They crossed the border from Presidio to Ojinaga, west of Big Bend, then bounced over increasingly rough roads to the villages — the big one has a population just over 100 — after 14 hours on the road, to set up clinics and p ...