propaganda

Throughout the 30s and 40s marijuana was presented as the scourge of the western world, despite the fact that most people had no idea what the plant actually was, or what it was used for. The reasons for initially banning it are complicated, and have little to do with the effects of the drug...

Did Harry J. Anslinger destroy University studies about weed when he was planning on making it illegal?? If he did, when did he do it and how many reports did he destroy?