October 22, 2017 all-day
Oct 22, 1962. President John F. Kennedy, in a nationwide television address on this date, demanded the removal from Cuba of Soviet missiles, launched equipment and bombers and imposed a naval quarantine to prevent further weaponry from reaching Cuba. On Oct 28, the USSR announced it would remove the weapons in question. In return, the US removed missiles from Turkey that were aimed at the USSR.
Image: US Central Intelligence Agency, Public Domain