From NBC4 local news in Washington DC:
About 100,000 gather on National Mall for 50th anniversary of March on WashingtonMSNBC pretty much covered the entirety of yesterday's event, but I don't recall ever seeing a crowd shot. Were I more conspiracy-minded, I'd think the audience's size was intentionally overlooked by the mainstream media.
After a little rooting around, though, I found this photo:
I'd say that's at least 100,000. It might not be as big a turn out as the original march in 1963, estimated to have been between 200,000 and 300,000, but it's still kinda huge. You may remember it was a big deal in 2008 when Candidate Obama would draw 30,000 people to a campaign event.
So please share the above photo - it's historically important!