A photojournalist at a site called Protestshooter has a nice photo essay on the Walk.
He/she pointed out something interesting and complimentary to the Walk.
He was up on Vaillancourt Fountain filming the rally:

Then after covering the Walk for Life he (or she) came back:

ProtestShooter’s caption read:
“Back to the plaza – the one that was totally packed a half hour earlier. Notice the total lack of litter, and those port a potties were the cleanest I’ve ever used in the city.”

Great job, Walk for Life clean up crew–and thanks for your good manners, pro-lifers!