NSA Domestic spying kept secret 30 years Area 51 kept secret 39 years National Reconnaissance Office kept secret 51 years Operation Paperclip kept secret 53 years US service members who died during d-day rehearsal kept secret 34 years Amnesty to Japanese war criminals in Unit 731 kept secret 51 years

The truth is UFO’s and the alien pretense are too big to keep secret that his why there are already so many leaks from within the military, but until things are officially acknowledge the public is still just guessing.