Open secret

[3] The U.S. government did not explicitly affirm the existence of any military facility near Groom Lake, Lincoln County, Nevada, until 2013, when the CIA released documents revealing that the site was established to test spy planes.[11] Post Office Tower was completed in 1964 and information about it was designated an official secret, due to its importance to the national communications network.[13] It is often said that the tower did not appear on Ordnance Survey maps, despite being a 177-metre (581 ft) tall structure in the middle of central London that was open to the public for about 15 years.[17] This can be considered an open secret, because the Israeli government has never explicitly stated whether or not it possesses a nuclear stockpile, officially maintaining a policy of deliberate ambiguity.[18][19][20][21] Camp Mirage is the codename for a former Canadian Forces forward logistics facility located in Dubai, United Arab Emirates.
Area 51 Groom Road gate
Open secret (disambiguation)Area 51United Statesmilitary baseGroom LakeLincoln CountyNevadaconspiracy theoriesfolkloreNational Security AgencyPresident TrumanNational Security Council Intelligence Directive (NSCID) 9classifiedBritishSecret Intelligence ServicePost Office TowerDuncan CampbellKate Hoeyparliamentary privilegeOrdnance SurveyLondon A–Z street atlasIsraelwidely acknowledged to possess nuclear weaponspolicy of deliberate ambiguityCamp MirageCanadian ForcesUnited Arab EmiratesKayfabeprofessional wrestlingThe StigBBC TelevisionTop GearembargoHe never marriedPronoun gameSecret de PolichinelleAlena V. LedenevaNBC NewsFederation of American ScientistsThe Washington PostParliamentary Debates (Hansard)The Times