Habeas corpus began in England. And recently, 175 members of the British parliament filed a "friend of the court" brief in one of the U.S. Supreme Court cases on habeas and Guantanamo—apparently, the first time in Supreme Court history that's happened. In their brief, the members of Parliament warn about the danger of suspending habeas: "During the British Civil War, the British created their own version of Guantanamo Bay and dispatched undesirable prisoners to garrisons off the mainland, beyond the reach of habeas corpus relief." In London, reporter Jon Ronson, author of Them: Adventures with Extremists, goes in search of what happened. (7 minutes)