In parts of cities like Washington, D.C., gunshot-detection systems are improving police response time to shots fired. Sometimes, the perpetrator hasn’t even had time to flee the scene when the cops arrive. See more »

Gathering reconnaissance during battle typically puts small teams of soldiers in harm's way. Tiny robotic flyers, called micro air vehicles (MAVs), could do away with this danger. Learn all about spy flies. See more »

There is some serious technology and ingenuity involved in making a 172-foot-wide, bomb-carrying aircraft "disappear." Find out how the B-2 bomber deals with enemy radar. See more »

Spies can have fake wives, fake degrees, fake interests and fake lives. Spies are often romanticized in Hollywood, but how does James Bond compare with real spies? And what happens when a spy is spying on the people he's supposedly spying for? See more »

Espionage, a secret attempt by a government to get closely guarded political, economic, or military information about another nation, especially one that is hostile. See more »

Code breakers use logic and intuition to uncover secret information. From ciphers in ancient Greece to modern computer encryption schemes, codes are becoming more complex and harder to solve. Who are the people breaking codes and how do they do it? See more »

When an airplane is described as a "stealth" aircraft, what does that mean? What is "stealth technology" and how does it work? See more »

Is the life of a spy really like it's portrayed on TV? This collection of articles illuminates the shadowy world of espionage. Learn all about spy gadgets spy gear spy planes and spying for the government. See more »

On a television drama last week, the plot involved photos taken of a Russian missile silo, and the characters mentioned a "keyhole satellite." What is a keyhole satellite and what can it really spy on? See more »

I've heard about small planes that help the United States military gather information. How do these remotely operated spy planes work? See more »