More important, that national obsession of the 1890s, the bicycle, made a huge comeback, partly inspired by the highly publicized example of wartime Britain, where bikes transported more than a quarter of the population to work. Less than two months after Pearl Harbor, a new secret weapon, the "victory bike"--made of nonessential metals, with tires from reclaimed rubber--was revealed on front pages and in newsreels. Hundreds of thousands of war workers, meanwhile, confiscated their kids' bikes for their commute to the plant or office, and scores of cities and towns sponsored bike parades and "bike days" to advertise the patriotic advantages of Schwinn over Chevrolet. With recreational driving curtailed by rationing, families toured and vacationed by bike. In June 1942, park officials reported that "never has bicycling been so popular in Yosemite Valley as it is this season." Public health officials praised the dual contributions of victory gardening and bike riding to enhanced civilian vigor and well-being, even predicting that it might reduce the already ominously increasing cancer rate.Read the entire article in the Sierra Club website; it's called Home-Front Ecology.