Nearly a half billion dollars worth of concrete reinforced steel bollards and other materials are sitting at sites across the length of the US-Mexican border, John B. Washington writes in a piece for the Atlantic. The Department of Defense technically owns the material, and some of it could be easily repurposed, but the bollards – hollow steel tubes filled with concrete and rebar – would be tough to scrap given the labor-intense removal of the concrete. Washington did not mention anything about the moat filled with alligators and snakes Trump wanted to have placed in front of his border wall. It is unlikely the moat was ever dug and even if it was the snakes and alligators have almost certainly slithered/crawled away for lack of human prey.