In this photo taken Nov. 27, 2013, Madi Carlson pedals as her sons Rijder, 4, left, and Brandt, 6, ride aboard the family cargo bike as they head to an after-school gym program in Seattle. People in the Pacific Northwest are pushing the limits of what they can carry using so-called cargo bikes, shuttling children, groceries, fish and kegs of beer.
Section:Photo