The Trump administration has begun detaining immigrants at Guantánamo Bay, Cuba, with plans for an expansion to hold 30,000 detainees. The first flight arrived carrying suspected gang members. The administration, amidst legal challenges and international scrutiny, aims to utilize military facilities for immigration detention, raising concerns over legal rights and the humanitarian treatment of migrants. Mexican officials have protested against sending nationals to Guantánamo, preferring direct repatriation. Existing legal restrictions on indefinite detention and due process for migrants are key concerns as the administration moves forward with its controversial plan.