1873-Sultan Barghash bin Said, under British pressure, closes the infamous slave market of Zanzibar in present-day Tanzania
1947-U.S. Secretary of State George Marshall outlines the "Marshall Plan" to rebuild Western Europe
1963-A state of siege is declared in Iran, and Ayatollah Khomeini is arrested
1967-Six-Day War begins between Israel and the neighboring Arab states of Egypt, Jordan and Syria
1968-Palestinian Sirhan Sirhan assassinates Robert F. Kennedy, shooting him 3 times and wounding 5 others at the Ambassador Hotel in Los Angeles, California. Kennedy dies the next day.
1981-AIDS epidemic officially begins when US Centers for Disease Control reports on pneumonia affecting five homosexual men in Los Angeles
1984-Indira Gandhi orders an attack on Sikhism's holiest site, the Golden Temple in Amritsar