Thousands rush to claim land in Oklahoma, the first nationwide Earth Day takes place, Richard Nixon dies, federal agents seize Elián González, and the Deepwater Horizon drilling rig sinks while spewing oil, all on this day.
Music icon Prince dies, John Adams becomes the first U.S. vice president, Mark Twain dies, and Geraldo Rivera opens Capone's vaults, all on this day.
Harriet Tubman begins her work with the Underground Railroad, Fenway Park opens, the Bay of Pigs Invasion fails, and tragedy hits Columbine High School, all on this day.
April 20, or 4/20, is a worldwide holiday for weed smokers everywhere. Here are some of the great American hotspots for weed culture, according to USA Today.