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 Trump administration has said it would expand operations at the American base in Cuba to hold up to 30,000 immigrants

The first military flights to deport migrants from the United States to Naval Base Guantanamo Bay were slated to take off Tuesday.