On This Day: September 3

On Sempter 3, the real origin of Labor Day. Plus, Encyclopædia Britannica's Kurt Heintz remembers the iconic director of It's a Wonderful Life and tells the disturbing story of the death of Colombian drug trafficker Griselda Blanco, known as the Godmother of Cocaine. Fast Facts highlight Qatar's independence day, the poetry of e.e. cummings, and the architect of the Sullivan Center.