The bollards, or “slats,” as he prefers to call them, should be painted “flat black ... s design requests for the barriers and about his conversations with engineers and border officials.

The Black Domain ... The design competition for the wall asks for two prototypes: a solid concrete wall and “other border wall”, a category more open to alternative ideas.

But the Trump administration is currently reviewing design bids for the project ... and many have additional functions beyond securing the border. The ideas — some of which are in protest ...

The Trump administration is testing part of the US-Mexico border wall with black coating ... CBP is responsible for questions about wall design, said a spokesperson for Army Corps of Engineers.

U.S. Customs and Border Protection has asked contractors for help making President Trump’s border wall more difficult to climb over and cut through, an acknowledgment that the design currently ...