Since J. Edgar Hoover made good his pledge to "clean up" organized crime, the FBI has become one of the world's most accomplished law enforcement agencies. Trained to perform high-risk hostage rescue missions, Agents are also anti-terrorist and violent crime experts. In a Crime Lab designed to complete with the world's best, FBI researchers made one of the most significant DNA breakthroughs of the 20th Century. An inside look at the real-life dramas, secret weapons, and crime-fighting expertise of the FBI.