Today is the 34th day of the year, with 331 days remaining until the end of the year.
313 - Constantine the Great and co-emperor Valerius Licinius met at a conference in Milan. They proclaimed a policy of religious freedom, ending the persecution of Christians in the Roman Empire, known as the Edict of Milan.
1690 - The colony of Massachusetts issues the first paper money in America.
1787 - Shays' Rebellion is crushed.
1870 - The Fifteenth Amendment to the Constitution is ratified, guaranteeing voting rights to citizens regardless of race.
1913 - The Sixteenth Amendment to the Constitution is ratified, authorizing the Federal government to impose and collect an income tax.
1945 - As part of Operation Thunderclap, 1,000 B-17s of the Eighth Air Force bomb Berlin. It is a raid which kills between 2500 to 3000 and leaves another 120,000 homeless.
1959 - A plane crash near Clear Lake, Iowa kills Buddy Holly, Ritchie Valens, The Big Bopper, and pilot Roger Peterson, and the incident becomes known as The Day the Music Died.
1961 - The United States Air Forces begins Operation Looking Glass, and over the next 30 years, a "Doomsday Plane" is always in the air, with the capability of taking direct control of the United States' bombers and missiles in the event of the destruction of the SAC's command post.
1971 - New York Police Officer Frank Serpico is shot during a drug bust in Brooklyn and survives to later testify against police corruption. Many believe the incident proves that NYPD officers tried to kill him.
1984 - John Buster and the research team at Harbor-UCLA Medical Center announce history's first embryo transfer, from one woman to another resulting in a live birth.
1995 - Astronaut Eileen Collins becomes the first woman to pilot the Space Shuttle as mission STS-63 gets underway from Kennedy Space Center.
1998 - Karla Faye Tucker is executed in Texas, becoming the first woman executed in the United States since 1984.