New Jersey Sen. Cory Booker delivered a fiery address Sunday to hundreds commemorating the civil rights march that came to be known as "Bloody Sunday."

Booker told the crowd at Brown Chapel AME Church that the anniversary was a time to recommit to the fight for justice in America.

"It's time for us to defend the dream," Booker said. "It's time that we dare to dream again in America. That is what it takes to make America great. It is up to us to do the work that makes the dream real."

Booker delivered keynote remarks at the church, the starting point of the 1965 march.

Democratic Sen. Sherrod Brown of Ohio, who is also considering a 2020 run, and 2016 presidential nominee Hillary Clinton also attended the service.

AP wire services helped contribute to this report.