Security ... think about it!
The Soviet Golf-II sub, the K-129, sank in 1968 in the Pacific, northwest of Hawaii, in circumstances that have never been explained. It was carrying three ballistic missiles armed with nuclear warheads. According to the newly-released papers, despite the difficulties of reaching the vessel some three miles down, Richard Nixon ordered the creation of a task force to bring it to the surface. The project was nearly cancelled due to soaring costs and concern that it might damage improving US-Soviet relations. However, a portion of the sub was eventually winched to the surface by the Hughes Glomar Explorer, a specially-designed salvage ship using a unique lifting cradle.