On a blustery morning last month, volunteer Adriana Jasso raised the flaps to a tent propped up against the massive steel bars of the fence that straddles this stretch of the US-Mexico border. On her side, plastic tables were piled with apples, packets of hot chocolate, mylar blankets and stacks of ponchos – supplies waiting for hungry and tired migrants who had travelled for weeks, or even months, to reach California.
On the other side, visible through the gaps in the towering barrier, a group of more than 100 people – from countries including Ecuador, Colombia, China and Rwanda – huddled together, waiting to be let through on to US soil. This border point south of San Diego is now one of the busiest along the entire US-Mexico frontier, which stretches around 1,950 miles (3,140km) from here to eastern Texas and the Gulf of Mexico.
