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1.
1478 – The Pazzi family attack Lorenzo de' Medici and kill his brother Giuliano during High Mass in which city's Cathedral ?
2.
1777 – Sybil Ludington rode 40 miles (64 km) to alert American colonial forces to the approach of the British regular forces at what age ?
3.
1923 – The Duke of York weds Lady Elizabeth Bowes-Lyon at which London landmark ?
4.
1933 – Which official secret police force is established ?
5.
1943 – The Easter Riots break out in which city ?
6.
1944 – Heinrich Kreipe is captured by Allied commandos on which occupied island ?
7.
1956 – The "SS Ideal X" leaves Port Newark, New Jersey for Houston, Texas. She is the first of what type of vessel to be successful ?
Oil Platform Resupply Vessel
✓
8.
1958 – Final run of the Baltimore and Ohio Railroad's flagship service from Washington, D.C., to New York City after 68 years. What was it known as ?
9.
1962 – NASA's Ranger 4 spacecraft crashes where ?
10.
1966 – A new government, led by Ambroise Noumazalaye, is formed in which country ?
11.
1981 – Dr. Michael R. Harrison of the University of California, San Francisco Medical Center performs the world's first human surgery of what type ?
Heart Valve Replacement
✓
12.
1986 – A nuclear reactor accident occurs at which nuclear power plant ?
Chernobyl, Soviet Union
✓
13.
1991 – Seventy tornadoes break out in the central United States. Before the outbreak's end, which city would record the year's only F5 tornado ?
14.
1949 – Jerry Blackwell, American wrestler was born this day. By what name was he known professionally ?
15.
1976 – Sid James, South African-English actor dies, for which film franchise was he best known ?