C-SPAN cameras in the U.S. House were shut off Wednesday morning during a sit-in over gun control legislation, but the cable network soon began broadcasting social media streams from legislators taking part in the event. House Democrats, led by Rep. John Lewis, D-Ga., had refused to stop their protest, which demanded a vote on gun control following last week's terrorist shooting in Orlando. C-SPAN launched in March 1979 to cover proceedings of the federal government. However, the network never has had full control over the cameras.