"Today was the day. Finally, powerfully, decisively -- the movement to stop climate change has come together," activist and writer Bill McKibben wrote in an email to 350.org supporters.
"This was the biggest climate change rally in US history. By our count, 50,000 people gathered by the Washington Monument and then marched past the White House, demanding that President Obama block the Keystone XL pipeline and move forward toward climate action."
USA Today said "tens of thousands" in their story, with its unflattering photo of McKibben, so reminiscent of press coverage of early Civil Rights and antiwar marches. The Sierra Club news release contains a list of speakers and excerpts from speeches. Think Progress has a brief story and photos.