SELMA, Ala. » The Bloody Sunday 50th anniversary commemoration continues Sunday with a series of events in Selma before a group retraces the steps that helped secure equal voting rights 50 years ago.

Sunday’s events are expected to include church services, film screenings and a pre-march rally at the foot of the Edmund Pettus Bridge.

Police beat and tear-gassed marchers at the foot of the bridge in Selma on March 7, 1965 in an ugly spasm of violence that shocked the nation. The attack on demonstrators preceded the Selma-to-Montgomery march, which occurred two weeks later. Both helped build momentum for congressional approval of the Voting Rights Act later that year.

A march from Selma to Montgomery in remembrance of the journey the demonstrators took is scheduled to begin Monday morning and culminate with a rally at the Alabama state Capitol on Friday afternoon.

Thousands gathered Saturday in the town of roughly 20,000 to hear speeches from leaders including President Barack Obama and Georgia Rep. John Lewis — an Alabama native who was among the demonstrators that was attacked by law enforcement on a march for equal voting rights.

Both gave rousing speeches on the work left to be done to achieve equality and Obama also touched on improvements in American race relations. The president mentioned recent high profile clashes between citizens and law enforcement on the circumstances leading to fatal police shootings and law enforcement tactics toward minorities.

"We just need to open our eyes, and ears, and hearts, to know that this nation’s racial history still casts its long shadow upon us," Obama said. "We know the march is not yet over, the race is not yet won, and that reaching that blessed destination where we are judged by the content of our character requires admitting as much."

The president also addressed notions that the prejudice that characterized the civil rights era exists in more insidious forms today and little or nothing has changed since then.

"Ask the female CEO who once might have been assigned to the secretarial pool if nothing’s changed. Ask your gay friend if it’s easier to be out and proud in America now than it was 30 years ago. To deny this progress – our progress – would be to rob us of our own agency, our responsibility to do what we can to make America better," he said.

On his way to Selma, Obama signed a law awarding the Congressional Gold medal to participants in a trio of marches in Selma, the last of which brought protesters all the way to Montgomery.