The Long, Frustrating Quest for a 'Smart Wall'

The break room is stocked with free sparkling water. The worktables are a lacquered, honey-blonde wood. And in the center of the gleaming workspace, under the scalding white ceiling of a two-story atrium, stood the solution to the southern border problem. Its four mechanical legs spread over the polished cement. A metal mast rose in bolted sections and at the top, level with the second floor's glass-walled offices, were two boxes.