As tents went up in Guantanamo Bay, Cuba to hold migrants, attorneys at the Department of Homeland Security and Pentagon were still trying to determine whether it was legal to take the unprecedented step of flying migrants from the US southern border to the facility,

The first U.S. military flight to deport migrants from the United States to Guantanamo Bay has departed and is expected to land Tuesday evening, two U.S. officials said. It is the first step in an expected surge in the number of migrants sent to the Navy base in Cuba,