Why I will march for my son and all those killed by police violence in our communities.

Alicia Garza and two friends first tweeted #BlackLivesMatter to spark a conversation after the death of Trayvon Martin. Three years later, their rallying cry has gained significant national attention.

The national focus on flaws in our criminal justice system this year could lead to stronger reforms in 2015.

This year will be remembered as a turning point, when those in charge of the multibillion-dollar athletic-industrial complex saw their control over the levers of power slip in a decisive fashion.

Watch video from the Senate Judiciary subcommittee hearing on the state of civil rights in response to the recent killings of unarmed black men by white police officers.

Protests against racist injustice — triggered by the failure of the criminal justice system to indict the killers of Michael Brown and Eric Garner — has propelled Obama to recall his community organizing roots.

Activists are transforming outrage into community organizing projects, voter registration drives and mass protest campaigns.

Protesters spilled into the streets of New York and other cities over the past two nights. The NYPD arrested 223 in clashes.

In an encore broadcast, journalist Ta-Nehisi Coates talks about the nation’s legacy of slavery and white supremacy.

Ta-Nehisi Coates: "What clearly cannot be said is that violence—like nonviolence—sometimes works."