This video grab courtsy of CSPAN shows a sit-in at the US House of Represenatives on June 22, 2016 in Washington, DC. US Democrats staged a rare sit-in Wednesday in the House of Representatives, demanding that the Republican-led body vote on gun-control legislation following the Orlando nightclub massacre."We have to occupy the floor of the House until there is action," Democratic Congressman John Lewis, a civil rights icon who marched with Reverend Martin Luther King Jr in the 1960s, said before he and dozens of colleagues sat down on the carpeted well of the chamber.The dramatic action came just as the House presiding officer moved to declare the body in recess. / AFP PHOTO / CSPAN / HandoutHANDOUT/AFP/Getty Images