single file

Drone footage from the weekend showed long lines of men and boys standing or walking in single file.

Compared to cells moving in a single file, clusters were much slower.

They lined up single file against the brush, in a dusty clearing steps from Highway 94, and waited for Border Patrol agents to pick them up.

So, when exhausted and inexperienced climbers inevitably struggle there, everybody else waits in a single file, hanging onto a fixed rope, while the bottled oxygen they need to survive at that altitude slowly drains away.

After they enter in a single file, they branch off in different directions and head into tunnels where each person has a designated area to drill.