During Cold War, CIA Plucked Soviet Submarine from Ocean Floor Using Giant Claw
Possibly the coolest and most spooky Cold War artifact:  https://www.youtube.com/watch?v=aJAJUJ41PBIIt's the video on board the Glomar Explorer of a burial at sea ceremony of Soviet sailors found in the half of the submarine they managed to bring to the surface.  Supposedly this was Top Secret until a copy was given to Yeltsin in 1991 or so.