Late Thursday evening, when sniper fire rang out across downtown Dallas, a bystander, Michael Kevin Bautista, used his smartphone to stream the events in real time on Facebook Live. Within the hour, CNN was rebroadcasting the footage.The day before, Diamond Reynolds streamed on Facebook Live after local police in Falcon Heights, Minn., shot her boyfriend, Philando Castile, ratcheting up a controversy surrounding how police officers treat African-Americans.
http://www.nytimes.com/2016/07/09/technology/facebook-dallas-live-video-breaking-news.html