They used to be able to embrace each other through the bars, but, in an effort to reinforce the fence further with steel mesh, that access has been progressively cut off.But what once was a place that allowed hugging, is now a place for touching fingertips.

There, a gaggle of tijuanenses, Central and South American migrants, deported veterans and immigrants, and a newly-arrived Haitian migrant had gathered to lock hands, forming a human barrier alongside the steel barricade. “The human wall” they called the demonstration.

In late January, with the signing of that executive order, the third to which he put his pen, the gears of what Trump has called a “fine-tuned machine” began to turn in preparation for “the immediate construction of a physical wall on the southern border.”Trump has made clear that when discussing “the wall” he is referring to a “hardened concrete, rebar, and steel” barrier, which would span the nearly 2,000-mile stretch of beach, mountains, desert, and rivers dividing the U.S. from its southern neighbor.

Despite the obvious logistical challenges such a construction would bring, Trump has made himself resoundingly clear. “It’s not a fence. It’s a wall,” Trump repeated, yet again, last month.