World History Moment: Invention Of RADAR
Radio, as a technology, has many uses beyond providing our favorite songs. In 1935, a group of scientists were devising a radio death ray when they discovered a way of tracking the placement of airplanes in the sky. The experiments proved very useful to the British during WW II.
Historian John Schmidt shares how the same radio waves we use to listen to WBEZ also helped defeat the Nazis.