On This Day: 

In 1965, hundreds of civil rights marchers trying to cross the Edmund Pettus Bridge in Selma, Ala., were turned back by state troopers and sheriff's deputies. Dozens of people were beaten and injured in what became known as "Bloody Sunday." Marchers voluntarily turned around on a ceremonial walk to the bridge two days later and, on March 21, with protection by federal and National Guard troops, the main Selma-to-Montgomery march began.

File Photo by David Tulis/UPI