In Geneva, teenage activists huddled inside a metal cage outside the U.N. headquarters Monday to demand migrant children in U.S. custody be reunited with their parents and to call for the U.N. Human Rights Council to address complaints filed last year against President Trump’s “zero tolerance” family separation policy. Randi Weingarten of the American Federation of Teachers helped organize the protest.

Randi Weingarten “We believe that 2,500 children have been separated from their parents in the last year. There are court cases after court cases where the Trump administration have been told to reunite children with their parents. That has not happened. Instead, the Trump administration has pleaded that they don’t know how to reunite, that they don’t know—they don’t have the records.”

The American Federation of Teachers filed the complaints with the U.N. Human Rights Council.