The U.S. picked the Mexican state without screwworm to reopen the border. Then it got screwworm

At daybreak, rancher Martín Alfonso Ibarra takes advantage of the cooler hours in northern Mexico’s desert to oversee the milking of his cows and tend to 16 prized calves. Soon, he hopes, they will be headed north to the United States as a yearlong ban on Mexican cattle imports comes to an end. The ban, imposed over […]