Deeper into the yard, teen girls kicked a soccer ball and tossed a football with workers from the Federal Emergency Management Agency.
In Nogales, Arizona, girls playing soccer with two male border agents shrieked when their ball crossed over the chain link fence and away from the small recreational area covered by a white tent. Others playing basketball cheered on their teammates.
Inside, the approximately 1,000 children in the clean, 120,000-square-foot warehouse were silent.
In a roomy area with teenage boys, a large, high-definition TV playing the World Cup went largely ignored. A small group of boys played soccer, but most lay on tiny mattresses and covered themselves with thin, heat-reflective blankets that looked like aluminum foil.
Chain link fences 15 feet tall and topped with barbed wire separated the children by age and gender.
Federal agents said they could not provide an estimate of the number of minors at the facility because the figure is fluid as children transition in and out.
Authorities at the Nogales station have struggled to adjust to their new role as temporary caretakers.
For example, it took a few days of children rejecting breakfast burritos before agents learned that Central Americans aren’t accustomed to flour tortillas. FEMA renegotiated its contract with a food vendor to begin receiving corn tortillas instead.
The children are fed three times a day and take turns by group to use the 200-seat dining area.