Change in Bombing Priorites 1941

[Bombphoon]

Hi Chris
Not specific, but if my memory serves me right, in the World at War, Adolf Galland says that Hitler told him and his assembled Luftwaffe officers that there would be a final heavy air raid to distract attention away from German preparations re. Barbarossa.
Incidentally, re. 'secret files': now we all know authorities can be trusted as far as they can be (over)thrown, but I've often heard the rumours about empty box files with a note in saying 'documents transferred/removed' etc. If authorities really wanted to cover up something, surely they'd replace the papers with fakes or simply just steal/destroy/chuck the whole file away?
Austin