The greatest cover-up would be one nobody would believe nor consider to be a cover-up! It would consist of a fact everybody considers to be true, yet would be the greatest lie ever told, in plain sight. In other words, if you would try to expose it to people, they would snicker and laugh you to scorn, as they are taught to consider the skeptics stupid or uneducated dupes!
Go ahead and snicker, but I’m going to blow the whistle on this thing anyway, even though many may stop reading once they figure out which one it is. But I’ll try to build my case slowly and break it to you with little known scientific facts and proofs before you figure it out and react in programmed disgust.