The baritone voice of a Border Patrol agent booms above the crying. “Well, we have an orchestra here,” he jokes. “What’s missing is a conductor.”

Then a distraught but determined 6-year-old Salvadoran girl pleads repeatedly for someone to call her aunt. Just one call, she begs anyone who will listen. She says she’s memorized the phone number, and at one point, rattles it off to a consular representative. “My mommy says that I’ll go with my aunt,” she whimpers, “and that she’ll come to pick me up there as quickly as possible.”