A girl holds a balloon as she walks among tents inside an empty warehouse used as a shelter set up for migrants in downtown Tijuana, Mexico, Wednesday, January 2, 2019. Discouraged by the long wait to apply for asylum through official ports of entry, many migrants from recent caravans are choosing to cross the U.S. border wall and hand themselves in to border patrol agents. (Photo by Daniel Ochoa de Olza/AP Photo)
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