Thousands march on Washington in protest over racist violence

The march commemorating the 57th anniversary of the Rev Martin Luther King Jr’s “I Have A Dream” speech (AP)

The son of the Rev Martin Luther King has issued a sobering reminder about the persistence of police brutality and racist violence targeting black Americans.

Martin Luther King III spoke on the steps of the Lincoln Memorial in Washington DC, where his father famously laid out a vision for harmony between white and black people 57 years ago with his “I have a dream” speech.