Top Secret Weapons Revealed

A look at Allied weapons designed to overcome German defenses on the beaches of Normandy on June 6, 1944.

A series exploring successes and failures in military technology throughout history begins with the quest to develop guided bombs during World War II, including ideas to use cats, bats and pigeons.

An examination of the U.S. Army's efforts to give individual soldiers the ability to fly, including the use of rotor blades, rocket packs and jet engines.

A look at Nazi plans during World War II to develop a number of revolutionary weapons, including massive artillery and tanks, a "flying wing" and the use of rocket power.

A look at the race during the Cold War to develop a seaplane capable of transporting troops and armored vehicles, and evading enemy radar.

Cold War spy technology is developed to wage a war of espionage between the U.S. and the Soviet Union.