Say the name, Alton Sterling. But remember the number, 558. And then think about this. It's been 720 days since the killing of Eric Garner, and 697 days since Michael Brown was gunned down in the streets of Ferguson. Since then, people have formed a movement called Black Lives Matter and clogged the streets and blocked traffic from the West Side Highway to the streets of Oakland. Committees have been formed, studies have been launched, police departments have — in slow motion, for the most part — purchased body cams. Governments and district attorneys have been changed, in Ferguson, in Cleveland, in Baltimore and Chicago. A handful of cops have been charged with crimes, and then of them most have been exonerated by the American way of justice.