Declassified Canadian UFO Documents, search for Michalak

23 June, 1967 Mr. J. M. McCormick Plantagenet Ontario Dear Mr. McCorpLock: The substance which you need to use consists of strips of metal-coated plastic. It has the property that a target-cloud of it in the air is a good reflector of radar waves. If dropped by aircraft it will confuse radars and bake them from observation. It comes in small balls that normally break apart when dropped from an airplane. It appears that you caught a place which had not broken up. During world war 11 it came to be called "window" or "chaff". Yours sincerely, PA 2 . Upper Atmosphere Research