Military planes are being used for deportations to expedite the process quickly and efficiently, with little concern for costs, as part of Donald Trump’s national emergency on illegal immigration.

U.S. officials say the first military aircraft carrying detained migrants to Guantanamo Bay is expected to depart on Tuesday.

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,