A visit to the Sierra Blanca checkpoint in Texas that has busted Willie Nelson, Snoop Lion, Fiona Apple, Nelly, Armie Hammer and many other travelers passing through with pot in their cars:

“Meanwhile, my fingerprints were recorded on an inkless electronic touch pad such as I’d never seen on a television cop show, and my picture was taken with one of those egg-shaped digital cameras that nobody would use but a government agency with no interest in flattering you. Then I sat there in handcuffs for hours while my prints and mug shot were circulated to cop databases around the nation. This is a worrisome process for anyone. Who among us can ever be sure we haven’t pissed off a government computer somewhere?

“The rationale for all this effort was later explained to me by Carry Huffman, the deputy chief patrol agent of the Big Bend sector. “Every pothead isn’t a bad guy,” he said. “But every bad guy is a pothead.” By detaining people for a couple of joints, the Border Patrol, which since 2003 has been part of the Department of Homeland Security, is able to investigate everything about them, and this can occasionally lead to catching some genuinely bad guys. Car thieves and fugitives and completely clueless big-time smugglers—not to mention terrorists—all can be snared in the follow-up to the canine alarm. Of course, that happens only rarely; nationally, the Border Patrol has caught just one so-called terrorist, a University of Houston student practicing paramilitary operations in the Big Bend. But it’s not backing off.”