In response to a FOIA request I had submitted for the records of Croatian dissident nationalist and the manifesto writer for the hijackers of TWA-355 Bruno Busic, the CIA released fifteen pages of records (and invoked Glomar regarding the existence or non-existence of any other records), just finished intelligence reports, on him. The first document is a single page from the 21 September 1972 Eastern Europe Intelligencer in which the CIA reported that Busic, Franjo Tudjman, and another man were on trial, accused of working with “unspecified foreign intelligence service,” which in the case of Busic meant the CIA. The CIA also made note of Busic's contacts with emigre Croatian radicals.
The next document is the entire 14 December 1971 Central Intelligence Bulletin in which Busic was discussed. Sandwiched between a redacted in its entirety article and an article on the controversy very over the Soviet intention to open an embassy in Costa Rica is a page long article on the crackdown on Croatian nationalists by the Yugoslav government. At least thirty people, including Bruno Busic, were arrested and the Yugoslav government denounced their actions and threatened further interventions to maintain order.