Twelve thousand men and women are the first line in Americas defence against terrorists, the mob and serial killers. For 100 years, the Federal Bureau of Investigation has protected the country and now, for the first time ever, the Bureau is allowing National Geographic to take a glimpse at what agents do in the field every day. With a population of 1.7 million under their jurisdiction, the Norfolk, Virginia, bureau works to bring some of humanitys nastiest individuals to justice. Trained in the use of deadly force and the latest forensic science techniques, these agents dont spend their lives kicking in doors and solving cases in an hour. Long, careful preparation, the wrangling of informants and the latest high-tech weapons help them protect the citys strategic maritime assets as well as bust a multi-million dollar cocaine ring thats been in their sights for ten years.