On Sunday, I stood at the end of a barren cul-de-sac overlooking a field on the U.S. side of the border, staring toward Mexico.
President Trump's border wall prototypes were off in the distance, about a mile away. This area — the ironically named "Free Speech Zone" — was as close as the public can get to the prototypes. (If you are on the Mexican side of the border, however, you can get a lot closer.) In anticipation of protests, temporary signs were posted on street poles, prohibiting the possession of firearms, daggers, slingshots, sticks, bats, pepper spray and other "implements of riots."