America's first black president cast law enforcement reform as a chief struggle for today's civil rights movement.
Obama said improving civil rights and civil liberties with police is one of the areas that "requires collective action and mobilisation" 50 years after pivotal civil rights marches brought change to the country. The president made his first remarks about this week's Justice Department report of racial bias in Ferguson, which found officers routinely discriminating against blacks by using excessive force.
The Justice Department on Wednesday cleared Darren Wilson, the white former Ferguson officer who shot Brown, of federal civil rights charges in the shooting.
Obama's interview was to preview his trip tomorrow to Selma, Alabama, where he plans to speak from the Edmund Pettus Bridge, where white police officers beat civil rights protesters on March 7, 1965. Obama last visited Selma in 2007, when he was running for the Democratic presidential nomination and spoke about the responsibility of those who came after the civil rights generation of the '60s to carry on the struggle.