An NYPD hostage negotiator teams up with a federal agent to rescue dozens of tourists held hostage during a 10-hour siege at the U.S. Federal Reserve.An NYPD hostage negotiator teams up with a federal agent to rescue dozens of tourists held hostage during a 10-hour siege at the U.S. Federal Reserve.An NYPD hostage negotiator teams up with a federal agent to rescue dozens of tourists held hostage during a 10-hour siege at the U.S. Federal Reserve.