I don't know how many bikers were there but there was a huge number. I watched them pass on Constitution Ave. for about two hours, then had to leave. Later I saw CNN show ten who met with Bush and just one bike on the street, leaving the impression like it was just a small show.
There would have been even more. I was talking to some bikers in my church parking lot out in suburban Virginia who said the highways and streets into the city were so backed up they gave up. I can hear them already this morning as they fire up their bikes to roll home.
I emailed CSPAN encouraging them to reconsider their decision to drop coverage as it's the best attention paid to the POW/MIA issue.