US President Barack Obama is taking part in events to mark the 50th anniversary of America's Bloody Sunday in Selma, Alabama.
Mr Obama and his family will walk across a bridge in the town where in March 1965 armed state troopers attacked unarmed protesters marching for voting rights for African Americans.
The Brown Chapel in Selma was the starting place for the march in protest at the denial of voting rights for African Americans.
600 people gathered that morning at the Brown Chapel in Selma, they prayed and then walked the short distance to cross the Alabama River, bound for Montgomery.
The march was organised by Martin Luther King Jr's organisation and led by then student leader and now Congressman John Lewis.
The day became known as Bloody Sunday and caused national outrage, and ultimately led to President Lyndon Johnson signing the Voting Rights Act.
