The CIA secretly discovered and then raised from the seabed fragments of a lost soviet submarine in the 60s, in order to obtain soviet nuclear secrets and warheads. Some bodies were recovered with the wreckage.
Even though it was a super secret operation and the middle of the cold war, the CIA put together a respectful and moving funeral ceremony for the soviet submariners onboard the recovery ship, and they were then buried at sea. The ceremony was filmed and later, after it was declassified, the ceremony was shared with the soviet leadership and the known families of the submariners.