In conjunction with Facebook, ABC News produced a special this morning on the tragedy in Tucson. The 15-minute report streamed live on ABCNews.com at 11amET and was anchored by Christiane Amanpour and Dan Harris in Tucson. Another special will stream tonight at 7pmET anchored by David Muir, following “World News.” Randi Zuckerberg of Facebook took part in this morning’s stream and talked about how the shootings are playing on Facebook. Harris also asked her how sites like Facebook often host some of the hatred and rhetoric which is at the center of the discussion today.