US 19th Engineer Battalion unfurls miles of fencing on Mexico border

Laredo (US): They started work in the cool of the morning and moved quickly, uncoiling reel after reel of vicious-looking fencing and tying it with barbed wire to green poles hammered into the ground.

Over the course of three days, a gleaming, shoulders-high barrier of concertina-wire emerged like a silver snake along a lush riverbank, stretching as far as the eye could see.

This was the work of 100 or so American troops from the 19th Engineer Battalion, based in Fort Knox, Kentucky.

Rather than finding themselves in a far-off warzone, the soldiers are in Laredo, a busy border town overlooking a stretch of the Rio Grande river in southwest Texas, carrying out controversial orders from President Donald Trump.

He has sent about 5,800 troops to the border to forestall the arrival of large groups of Central American migrants traveling through Mexico and towards the US, in a move critics decry as a costly political stunt to galvanize supporters ahead of midterm elections earlier this month.

Before the election Trump called the matter a "national emergency" and warned that so-called migrant caravans were an "invasion" with "some very bad thugs and gang members." So far at least, the most visible aspect of Trump's deployment is the fence, a visible deterrent and physical obstacle to migrants, designed to corral would-be asylum seekers towards organized points of entry into the US.

Over the weekend, Lieutenant Alan Koepnick's platoon could be seen stringing concertina wire, which is built to snag clothing, along one edge of a quiet riverside park near downtown Laredo.