1818 – US Medical Corps forms.
1828 – First American Dictionary: its author Noah Webster registers its copyright for publication.
1863 – William Bullock patents continuous-roll printing press.
1865 – US President Abraham Lincoln is shot by John Wilkes Booth at Ford’s Theater in Washington.
1902 – J.C. Penny opens his first store, The Golden Rule Store in Kemmerer, Wyoming.
1906 – US President Theodore Roosevelt denounces “muckrakers” in US press, taken from John Bunyan’s Pilgrim’s Progress.
1910 – President Taft begins tradition of throwing out ball on opening day.
1912 – RMS Titanic hits an iceberg at 11:40p.m. off Newfoundland.
1918 – Douglas Campbell is 1st US ace pilot (shooting down 5th German plane)
1939 – John Steinbeck novel “The Grapes of Wrath” published.
1945 – World War II: US 7th Army & allies forces capture Nuremberg & Stuttgart in Germany.
1955 – Elston Howard becomes the 1st black to wear a Yankee uniform.
1960 – American record company Motown, founded by Barry Gordy, Jr., is incorporated as Motown Record Company.
1971 – President Nixon ends blockade against People’s Republic of China.
1983 – US President Reagan signs $165 billion Social Security rescue.
1986 – US aircraft attacks 5 terrorist locations in Libya.
1992 – Court throws out Apple’s lawsuit against Microsoft.
1994 – US F-15 accidentally shoots 2 US helicopter down over Iraq, 26 die.
2005 – The Oregon Supreme Court nullifies marriage licenses issued to gay couples a year earlier by Multnomah County.
2012 – J.K. Rowling, author of the Harry Potter novels, launches her website “Pottermore”