A new migrant detention facility on a military base near the U.S.-Mexico border is scheduled to begin operations on Sunday. The Trump administration says that, upon completion, it will be "the largest federal detention center in history."

A new migrant detention facility on a military base near the U.S.-Mexico border is scheduled to begin operations on Sunday. The Trump administration says that, upon completion, it will be "the largest federal detention center in history." WASHINGTON —

A new migrant detention facility on a military base near the U.S.-Mexico border is scheduled to begin operations on Sunday.

The Trump administration said that, upon completion, it will be "the largest federal detention center in history."

Officials say the new facility at Fort Bliss in El Paso will in

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