Well the Manhattan Project was kept totally secret, that involved over 100 000 people. Not one single leak or peep , absolutely no-one not involved or cleared knew anything at all about it until the info was official released,. They even built two complete cities to house the workers and no-one (other than those involved) knew anything at all about until decades later. I recall listening to ytube post about how even the primary astrologers/ scientists using the Hubble telescope has never ever seen any 'live-feed or raw image data' from the Hubble - its all feed through various software/ computers and rendered before they gets it . So bottom point is the line of ' THERE IS NO WAY TO KEEP SUCH A SOPHISTICATED CONSPIRACY SECRET.' is simply horse shit, when most of the individuals involved are totally unaware of the big picture.