That conflict led to the song "Sunday Bloody Sunday."

VOA: special.2009.10.19

The trouble with public inquiries is that like the inquiry into the Bloody Sunday murders 30 years ago they can drag on for years and cost millions.

ECONOMIST: Northern Ireland

The event commemorates the "Bloody Sunday" beating of voting rights marchers including a young Lewis by state troopers as they began a march to Montgomery in March 1965.

NPR: Biden Leads Re-Enactment Of Voting Rights March

In response to Bloody Sunday, Dr. King put the word out asking supporters from around the nation to travel to Selma to participate in another march to take place two days later, a march intended to go from Selma to Montgomery, Alabama.

FORBES: What Was Obama Talking About When He Cited The Historical References Of 'Seneca Falls And Selma And Stonewall'?