The problem is that ‘proof’ is never going to be enough to convert the purely skeptical. We have a hundred years of photos, video, film, aircraft pilot reports, reports from our own and foreign governments (both released and leaked), thousands of testimonials from pilots both military and civilian, sworn affidavits from government insiders, radar data - and still they want ‘proof’. Do you know who else refuses to acknowledge ‘proof’ when it is presented to them? The Flat Earth Society, whose members cling to their beliefs in the face of absolute science. No amount of proof is enough for either group. Perhaps instead we should focus our efforts on improving ourselves, instead of trying to prove minutiae that will not settle any discussion anyway.