Spy files

Discusses the difference between codes and ciphers, examines common codes and ciphers that have been used during wars, and explains how to create simple ciphers.

Discusses the difference between codes and ciphers, examines common codes and ciphers that have been used during wars, and explains how to create simple ciphers.

Discusses American, British, and Russian spies and secret agents, and the history of espionage, with profiles of famous spies and double agents.

Discusses equipment and technology used by spies, including satellites, cameras, lie detectors, listening devices, and more.

Discusses equipment and technology used by spies, including satellites, cameras, lie detectors, listening devices, and more.

Examines the skills and training needed to become a spy, describes various spying techniques and types of surveillance, and includes profiles of famous spies and double agents.

Discusses American, British, and Russian spies and secret agents, and the history of espionage, with profiles of famous spies and double agents.

Discusses the difference between codes and ciphers, examines common codes and ciphers that have been used during wars, and explains how to create simple ciphers.