We didn’t have to see live video footage shot from inside the collapsing buildings and uploaded onto YouTube. Cellphones didn’t have cameras back then. … Can you imagine how horrifying it would have been if we had tweets from the victims on the planes or in the offices, or if they had posted to their Facebook pages?
… Twitter, Facebook, YouTube and all the technologies that have yet to be invented make all these events more real, and more horrific. Television pales in comparison."
— Washington Post Publisher Katharine Weymouth, addressing what 9/11 would have been like if social media existed on 9/11. Poynter