On Aug. 19, 2013, the CIA publicly admitted for the first time its involvement in the 1953 coup against Iran's elected Prime Minister Mohammad Mossadegh.
60 years
I guess as far as Ukraine goes, CIA are going to admit their involvement in 2074? Which does not really matter, since the whole world knows that CIA had bases in Ukraine for a decade at least.
In the mean time, here's a Short History of CIA Interventions in Sixteen Foreign Countries.
https://www.cia.gov/readingroom/docs/CIA-RDP74B00415R000400170054-7.pdfNot a full list of countries CIA has meddled in by any means.
