My friend Andy mentioned that Sweet Honey in the Rock should have been there today, singing this. This is so much in the spirit of the day, and it's stuck in my head:
We who believe in freedom cannot rest
We who believe in freedom cannot rest until it comes
Until the killing of Black men
Black mothers' sons
Is as important as the killing of White men
White mothers' sons...
Link to a video here.
Link to lyrics here.