Spread over all this as a separate world unto itself was Security, which seemed opaque to Rufus, and was probably meant to be. There was an over-arching contract with a big international private firm that, he had to assume, kept tabs on threats from a distance just by monitoring the Internet, looking at remote imaging data, and conducting private investigations. Another firm basically did what rent-a-cops did on corporate campuses: performed routine patrols, checked credentials at gates, investigated calls. Basically they handled the 99 percent of security-related activities that did not require a lot of training, decision-making, or acceptance of physical risk. Their job was to be visible and call for help. They wore brown hats.