If a "yarn bomb" can be compared to a foot race, this one was a marathon.
Over the weekend scores of volunteers beset the Andy Warhol Bridge in Pittsburgh, affixing hundreds of pre-made, brightly colored yarn panels to the steel span.
But it was all months in the making, with hundreds of knitting and crocheting artists from across the region getting involved in the grassroots Knit the Bridge project.
Among those hanging panels on the bridge over the weekend was Pam Volz of Mt. Lebanon.