Add the #BlackLivesMatter sticker to your story: http://imgur.com/syT5igJ

 #BlackLivesMatter is an organization created by Patrisse Cullors, Opal Tometi, and Alicia Garza. Based on the broader campaign, Black Lives Matter calls for action and response against anti-Black racism that is happening in our society. 

For more detail, visit the Black Lives Matter book or the official website set up by the founders: http://blacklivesmatter.com/

If you wish to be part of the movement, simply read the requirements in #BlackLivesMatter book.