It was their camp during the entire riot ever since they broke the windows on the side of the capitol with people on the media tower and scaffolding. Everybody inside was ether antifa or paramilatary. Outside the window you could see a lady with jacked up duck lips and a bullhorn using NLP to stoke the flames between trump supporters and police and calling fellow antifa by name with into the room with the broken window. I have posted a picture from outside the office as well and you can tell its a shady bunch of folks there from that one alone. Inside there was the main room with a hallway and two offices.