This photograph showing British marines deployed in Grytviken, South Georgia near the Falkland Islands has been released by the National Archive under the 30-year-rule.
Other documents released reveal that the Americans wanted to inform the Argentinians that UK troops would be landing on South Georgia as part of its diplomatic peacekeeping mission.
The British ambassador to Washington, Sir Nicholas Henderson, succeeded in talking the Americans out of it.
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Around 31 people are still thought to be missing after the boat sank on a reservoir near the city of Medellin.
Bins were set on fire and objects were thrown at officers as protesters demanded justice for the death of Edir Frederico Da Costa.
Patients are being left "belittled and bewildered" as medical staff try to deal with overstretched systems, the BMA will warn.