Secret prisons reflect a parallel legal system for prisoners who are denied access to communications, deprived of their due process rights, and hidden from public scrutiny. Investigative journalist and TED Fellow Will Potter explains.Secret prisons are operating in the United States today. Many Americans I speak with don’t believe this could possibly be true, and think that such human rights abuses only occur in foreign countries. But the reality is that the United States has a dark history of disproportionately punishing people because of their political views, a history that has largely been ignored or forgotten…