A Somali teenager arrived to face what are believed to be the first piracy charges in the United States in more than a century, smiling but saying nothing as he was led into a federal building under heavy guard. Abdiwali Abdiqadir Muse, the sole surviving Somali pirate from the hostage-taking of an American ship captain, was to appear in a courtroom Tuesday on what were expected to be piracy and hostage-taking...