In early August 1974, despite incredible political, military and intelligence risks, and after six years of secret preparations, the CIA attempted to salvage the sunken Soviet ballistic missile submarine K-129 from the depths of the North Pacific Ocean. This audacious effort was carried out under the cover of an undersea mining operation sponsored by eccentric billionaire Howard Hughes. “Azorian”—incorrectly identified as Project Jennifer by the press— was the most ambitious ocean engineering endeavour ever attempted and can be compared to the 1969 moon landing for its level of technological achievement. Following the sinking of a Soviet missile submarine in March 1968, U.S. intelligence agencies were able to determine the precise location and to develop a means of raising the submarine from a depth of 16,560 feet. Previously, the deepest salvage attempt of a submarine had been accomplished at 245 feet. The remarkable effort to reach the K-129, which contained nuclear-armed torpedoes and missiles as well as crypto-logic equipment, was conducted with Soviet naval ships a few hundred yards from the lift ship, the Hughes Glomar Explorer. While other books have been published about this secret project, none has provided an accurate and detailed account of this remarkable undertaking. To fully document the story, the authors conducted extensive interviews with men who were on board the Glomar Explorer and the USS Halibut, the submarine that found the wreckage, as well as with U.S. naval intelligence officers and with Soviet naval officers and scientists. The authors had access to the Glomar Explorer’s logs and to other documents from U.S. and Soviet sources. The book is based, in part, on the research for Michael White's ground-breaking documentary film Azorian: The Raising of the “K-129”, released in late 2009. As a result of the research for the book and the documentary, the CIA was forced to issue a report on Project Azorian in early 2010, even though they tried to withhold all of the details from the public record by redacting one-third of that document. In this book, the untold story of the CIA’s Project Azorian is finally revealed after decades of secrecy.