1881 – In Dodge City, Kansas, gunslinger Bat Masterson fought his last gun battle. He paid an $8 fine and retired.
1908 – Natural Bridges National Monument was established in Utah.
1910 – The Boston Arena opened.
1912 – American aviator Harriet Quimby became the first female pilot to fly across the English Channel. She was also the first US licensed female pilot.
1943 – Albert Hoffmann accidentally discovered the psychedelic effects of Lysergic acid diethylamide (LSD)
1947 – The Texas City Disaster, ammonium nitrate explosion killed 571 people.
1947 – Bernard Baruch, in a speech given during the unveiling of his portrait in the South Carolina House of Representatives, coined the term ‘Cold War’ to describe relations between the United States and the Soviet Union.
1962 – Walter Cronkite became the news anchor for the CBS network.
1977 – #1 Hit April 16, 1977 – April 22, 1977: David Soul – Don’t Give Up on Us
1990 – ‘Doctor Death’, Jack Kevorkian, participated in his first assisted suicide. Janet Adkins was the patient, in Detroit, Michigan.
1995 – Governor George W. Bush named April 16 as Selena Day in Texas, after the singer was killed two weeks earlier.
2007 – Virginia Tech massacre: Seung-Hui Cho killed 32 people and injured 17 before committing suicide.