American code breakers have given the United States an edge in every conflict in American history. But with uncrackable encryption available for your cell phone and computer, have U.S. code warriors finally met their match?

A secret part of American history has remained hidden, locked away for centuries in the hulls of ships in New York Harbor or in the depths of an abandoned copper mine. These are America's Secret Prisons.

Gold ...one the most rare treasures on Earth. Since ancient times, man has gone to extreme and often deadly lengths to get it. But where is most of the gold today, and who owns it?

The Vatican is a secretive, watchful institution that protects its reputation and the members of its ranks with fierce, often reckless abandon. But the secrets and scandals throughout its history are some of the darkest in all of history.

From a secret society that gathers in the dead of night and plots the assassination of Abraham Lincoln to U.S. spymaster Alan Pinkerton who stops Confederate agents, the outcome of the Civil War is often decided by spies.

Pearl Harbor...the Day of Infamy that changed America forever. But was the attack really a surprise? What did FDR know about the attack beforehand? And who really fired the first shots of the Pacific War?