Robin Dunn Marcos, director of the Office of Refugee Resettlement, reluctantly answers that “We do not track or monitor” unaccompanied minors who cross the U.S. border during a hearing by the House Oversight and Accountability Committee’s subcommittee on national security. Reports of the high number of unaccompanied migrant children who have gone missing at the southern border leads lawmakers to raise concerns that the government agency had lost track of tens of thousands of children.