2017: A car bomb exploded in a crowded intersection in Kabul near the German embassy during rush hour, killing over 90 and injuring 463.
2013: The asteroid 1998 QE2 and its moon make their closest approach to Earth for the next two centuries.
2010: Israeli Shayetet 13 commandos boarded the Gaza Freedom Flotilla while still in international waters trying to break the ongoing blockade of the Gaza Strip; nine Turkish civilians on the flotilla were killed in the ensuing violent affray.
2005: Vanity Fair reveals that Mark Felt was "Deep Throat".
1991: Bicesse Accords in Angola lay out a transition to multi-party democracy under the supervision of the United Nations' UNAVEM II mission.
1971: In accordance with the Uniform Monday Holiday Act passed by the U.S. Congress in 1968, observation of Memorial Day occurs on the last Monday in May for the first time, rather than on the traditional Memorial Day of May 30.
1970: The 7.9 Mw Ancash earthquake shakes Peru with a maximum Mercalli intensity of VIII (Severe) and a landslide buries the town of Yungay, Peru. Between 66,794-70,000 were killed and 50,000 were injured.
1935: A 7.7 Mw earthquake destroys Quetta in modern-day Pakistan killing 40,000.
1927: The last Ford Model T rolls off the assembly line after a production run of 15,007,003 vehicles.
1924: The Soviet Union signs an agreement with the Beijing government, referring to Outer Mongolia as an "integral part of the Republic of China", whose "sovereignty" therein the Soviet Union promises to respect.
1921: Tulsa race riot: civil unrest in Tulsa, Oklahoma. The official death toll was given as 39, but other estimates of black fatalities vary from 55 to about 300.
1879: Gilmore's Garden in New York City is renamed Madison Square Garden by William Henry Vanderbilt and is opened to the public at 26th Street and Madison Avenue.
1866: In the Fenian Invasion of Canada, John O'Neill leads 850 Fenian raiders across the Niagara River at Buffalo, New York/Fort Erie, Ontario, as part of an effort to free Ireland from the United Kingdom. Canadian militia and British regulars repulse the invaders over the next three days, at a cost of nine dead and 38 wounded to the 19 dead and about 17 wounded Fenians.
1859: The clock tower at the Houses of Parliament, which houses Big Ben, starts keeping time.
1813: In Australia, William Lawson, Gregory Blaxland and William Wentworth reach Mount Blaxland, effectively marking the end of a route across the Blue Mountains.
1805: French and Spanish forces begin the assault against British forces occupying Diamond Rock.