Happy wheels, happy world: Bikes Not Bombs! Photos via Caroline Treadway.

Bayla Shepley pulled inner tubes off used bike rims on a recent rainy Saturday in Jamaica Plain, Boston. A high school student at the Cambridge school of Weston, Shepley was one of 15 Bikes Not Bombs volunteers who loaded nearly 450 landfill-bound bicycles and parts into a gray shipping container destined for Tanzania.

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