Lester Dent died. The creator of Doc Savage. Does that count?
What Happened On March 11, 1959?
A Raisin in the Sun by African-American playwright Lorraine Hansberry and starring Sidney Poitier , made its Broadway debut. The Sikorsky SH-3 King helicopter, also known as the H-3 Pelican or the S-61, was given its first flight by test pilots. Teddy Scholten won the Eurovision Song festival with "Een beetje" for the Netherlands.