Tens of thousands of demonstrators have taken to the streets of cities across the US, including Washington and New York, to protest at the killings of unarmed black men by police and call on politicians to act.

Organisers expect the rallies to be among the largest seen over the lethal actions of officers in New York, Cleveland and Ferguson, Missouri.

Protesters in Washington carried placards reading “Black Lives Matter” and “Who do you protect? Who do you serve”.

Among those taking part in the march on the US Capitol Building – the seat of the US Congress – are the families of Eric Garner, killed by an officer using a chokehold position in New York, Michael Brown, who was fatally shot in Ferguson, Trayvon Martin, who was shot by a neighbourhood watch volunteer in Florida, and Tamir Rice, who was fatally shot in Cleveland last month.

Esaw Garner, the widow of the 43-year-old who died in July after officers arrested him in Staten Island on suspicion of selling loose, untaxed cigarettes, told marchers: “Let’s keep it strong, long and meaningful.”.. see more

source: skynews