Race, police and the US - in numbers
Black Americans are much more likely to go to prison or be shot by police than whites, statistics show.
The outpouring of anger and concern which followed the death of black men in Missouri and New York this year as they were being arrested by white police officers has again drawn attention to this imbalance.
The proportion of black men who end up behind bars is considerably higher than the figure for white men.
Crime and punishment
African Americans make up just a small fraction of the overall population - but they account for much higher percentages of arrests, deaths related to arrests, and death row inmates.
Some of the criticism of US policing in recent months has centred on the fact that white officers dominate forces, even in areas where they make up a minority of the population.
In Ferguson, Missouri, where Michael Brown was shot dead, nearly two-thirds of the population of 21,000 are black. Of the 53 members of the town's police force, just three are black.
The proportion is more balanced in big cities like New York, where Eric Garner died while being restrained, but whites still tend to dominate law and order.