Along the U.S.-Mexico border

Immigrants are released from U.S. border security agents at a bus station on Jan. 6, 2017 in McAllen, Texas. Most families are from Central America and are first detained by the U.S. Customs and Border Security agents, who process them and release them for their onward journey to cities around the United States. They are required to appear in immigration court at a later date for their cases to be heard. (John Moore/Getty Images)