Foreign students in the Soviet Union were monitored by the KGB as they speculated on the Chernobyl disaster, an operation that sought to name those who saw the explosion as divine punishment.
Kept secret until 2016, these briefing notes show a world on the edge, from jailed Brazilians and Saigon sappers to the suspected bombing of Iraqi troops.
North Vietnamese troops edge toward Saigon while diplomats offer lip service, as Nixon tracks French bids to redraw borders and 10 students storm the US embassy in Tokyo.
Intelligence sources remain blacked out in notes to Richard Nixon detailing how 30 Viet Cong battalions threatened the Mekong Delta and Levi Eshkol fought a right-wing revolt.