In 1974 the Glomar Explorer retrieved a soviet submarine from 3 mile deep water. I’m sure we can recover this stuff.
Seymour Hersh of The New York Times uncovered some of the details of Project Azorian in 1974, but was kept from publication by the action of the Director of Central Intelligence, William Colby. Months after the salvage operation was completed, in February 1975, the Los Angeles Times ran a brief story regarding the CIA operation, which led The New York Times to release Hersh's story.