Operation Aerodynamic was a CIA covert programme that funded and directed Ukrainian émigré networks — principally the ZP-UHVR (Foreign Representation of the Ukrainian Supreme Liberation Council) and its associated Prolog Research Corporation in New York — to conduct psychological warfare and propaganda operations against the Soviet Union. The programme ran from 1949 into the 1990s. Key figure Mykola Lebed, a ZP-UHVR leader who received CIA support and US naturalisation, had documented ties to the Organisation of Ukrainian Nationalists (OUN-B) and a WWII-era record that included collaboration with Nazi occupying forces. Declassified National Security Archive documents and reporting by Eric Lichtblau and Ralph Blumenthal confirmed the programme and Lebed's history. The programme is confirmed; the question of what was concealed about its participants is partially established.