JOPLIN, Mo. — It’s hard to shoot down an enemy plane you can’t find. That was the whole idea behind a surprisingly low tech means of neutralizing German radar on D-Day. “When you can’t see the plane ...

How chaff was invented in World War II. Roger Connor Whipple donated this packet of chaff, a cardboard envelope filled with hundreds of strands of aluminum. Center: A Boeing B-17 airman pushes chaff ...

CHAFF: Armtec Countermeasures Co. of Coachella, Calif., will manufacture RR 188 chaff cartridges for the U.S. Air Force's air countermeasures program, the Department of Defense said Feb. 16. The work ...

A privacy technique that is simpler than encrypting a message with a key. Chaff is the unusable part of a plant, and winnow means to separate the chaff so it can be discarded. Thus, chaff is sent ...