The plan had always been to seek asylum in the U.S. But somewhere on the journey between their home in El Salvador and the northern Mexico border, Wilver Arteaga and his family realized there was no way.

The U.S. has closed its southern border again to livestock imports, saying a flesh-eating parasite has moved further north in Mexico than previously reported. Mexico's president was critical Thursday,

Secretary Rollins takes decisive action and shuts down U.S. Southern border ports to livestock trade due to further northward spread of New World screwworm in Mexico.