Central American migrants walking to the U.S. start their day departing Ciudad Hidalgo, Mexico, on Sunday. Despite Mexican efforts to stop them at the border, about 5,000 Central American migrants resumed their advance toward the U.S. border early Sunday in southern Mexico.

Central American migrants walking to the U.S. start their day departing Ciudad Hidalgo, Mexico, on Sunday. Despite Mexican efforts to stop them at the border, about 5,000 Central American migrants resumed their advance toward the U.S. border early Sunday in southern Mexico.