March 20, 2016: President Barack Obama becomes the first President to visit Cuba on a diplomatic mission since 1928.
March 21, 1925: The Butler Act, a Tennessee state statute, is passed prohibiting the teaching of evolution in public schools.
March 22, 1917: The United States becomes the first nation to recognize the temporary Kerensky government in Russia.
March 23, 1983: President Ronald Reagan launches the Strategic Defense Initiative (“Star Wars”)
March 24, 1947: Financier and philanthropist John D. Rockefeller Jr. donates East River site to the United Nations.
March 25, 1965: Rev. Martin Luther King Jr. leads 25,000 to state capital in Montgomery, Alabama
A version of this article appeared in the Tuesday, March 20th print edition.
Facts courtesy of onthisday.com and history.com