Beginning excerpt (stopping at the first video-which I don't know how to copy-that is pretty shocking in showing al large gaggle of police clearly in a fucking panic, struggling to put up a barricade after the fact while a large group of men try to prevent them from doing, with the mist of tear gas still in the air, people in front still tearing up)

Six days before a raucous rally of President Trump’s supporters in Washington, Representative Maxine Waters anxiously grilled the chief of the Capitol Police about his preparations for various scenarios: Were the rooftops secured? Would streets be blocked off? Did he know that violent groups like the Proud Boys and the Oath Keepers were vowing to stir up chaos?

Ms. Waters, a California Democrat, said each of her concerns was met with a similar response from Chief Steven Sund during their hourlong call: “He assured me that they have everything under control, that they were on top of everything.”

They weren’t. Instead an angry mob of pro-Trump extremists swarmed the barricades around the Capitol on Wednesday, spraying chemical irritants and wielding lead pipes, injuring more than 50 officers. They battered doors, broke windows and scaled the walls, rampaging through the building as congressional leaders made desperate calls for help.

The Capitol Police seemed to offer little resistance and arrested only 14 people, making it much more difficult to find and charge the rioters, according to a law enforcement official involved in coordinating the response.

Chief Sund, who took over the 2,000-member Capitol Police force two years ago and whose biography lists him as an expert in “critical incident management,” handed in his resignation on Thursday after pressure from congressional leaders. The sergeants-at-arms of the House and Senate resigned, too.

[....] Policing experts noted the absence of crowd-control tools such as mounted officers, police dogs or a heavily manned perimeter.

Pentagon officials said Thursday that the Capitol Police had turned down an offer for additional National Guard troops before Wednesday’s storming of the Capitol, and two law enforcement officials said they had initially rebuffed help from the F.B.I. as the mob descended.

“How they were not ready for this today, I have no idea,” said Charles Ramsey, a former D.C. police chief. “They were overwhelmed; they did not have the resources. You have to be able to protect the Capitol.”

But others in law enforcement insisted that the president’s encouragement of the mob could not have been anticipated.

“No one expected the president to say, ‘Hey guys, let’s all go down to the Capitol and show them who’s boss,’” said Jose Cervino, who worked for the department for 14 years and helped plan security for large events and protests. “That is a completely different thing that no one’s ever planned or prepared for. How could you?” [....]