#BlackLivesMatter is mostly commonly known as a hashtag that brings awareness to, and fights against police brutality towards African-Americans.
Cases of police brutality that gained national attention, and were protested by the #BlackLivesMatter movement.
Tweets from various Black Lives Matter chapters across the country.
The Black Lives Matter movement began as a hashtag on Twitter in response to the death of Trayvon Martin.
The Black Lives Matter movement, was created by Alicia Garza, Opal Tometi, and Patrisse Cullors.
The Black Lives Matter movement has a list of principles by which they guide themselves.