Announcer from nbc news World Headquarters in new york, this is nbc nightly news with lester holt. Good evening. We have seen political standoffs of all kinds in washington, but nothing like what is playing out right now in the chambers of the house of representatives. Oldfashioned sitin led by a civil rights icon. Democratic representatives literally occupying the house floor, refusing to budge until a gun control bill is brought up for debate. Social media continuing to provide images of the revolt, even after housecontrolled tv cameras were ordered turned off. Nbcs Peter Alexander is at the capitol right now with the latest. Not next year, but now today reporter an unprecedented demonstration, dozens of democrats today calling for a vote on gun control. Rise up, americans. This cannot stand. We will occupy this floor. Reporter disrupting the house session. The house will be in order. Reporter republicans in retreat, forced to go into recess, cameras showing the protest. The cameras