The footage is unremarkable at first glance. A father and son moving through an airport terminal. A small boy spreading his blanket across the floor, then wandering over to press his face against the window. Standard airport tedium, except that five-year-old Liam Conejo Ramos and his father, Adrián Conejo Arias, were not heading to a family vacation. They were heading to the South Texas Family Residential Center in Dilley, Texas, flanked by three escorts whose official capaci