How about a whole bunch of the fringe visited Washington DC Sept 12th?
Seems some think it was over a million, some say it's not, I orignally used the higher number that was reported here, and here which they have now downgraded, and not likely I'll believe much of what ABC says
Hours before Saturday's protest began, it was clear that the crowd of people opposing Obama's big-government policies would be larger than many anticipated. There are no official estimates of how many attended, but there's no doubt that the turnout, from the crush on Pennsylvania Avenue to the crowd at the West Front of the Capitol, was big -- perhaps in the 100,000 range.
Update, 9/15 The British take on the 9/12 march