Player Embed Code: <iframe width='500' height='300' scrolling='no' frameborder='0' style='border: none; overflow: hidden; width: 500px; height: 300px;' allowtransparency='true' src='https://www.dvidshub.net/video/embed/509026'></iframe> Download Embed Share DoD News in Focus: Radio, Ranging, Redirection Defense.gov Feb. 9, 2017 | 1:50 There’s an old adage that eating carrots can improve your eyesight. However, this axiom dates back to a British World War II misinformation campaign intended to conceal the Royal Air Force’s use of radar.