In 1989 Dr. Robert Vande Kappelle cycled solo cross-country. The 3,400-mile trip was the seed project for the Washington County (Pennsylvania) chapter of Habitat for Humanity. For forty-two days he went ""Homeless for Habitat,"" placing himself and his personal needs in the hands of strangers he met along the way. At the beginning he cycled across some of the most mountainous--and spectacular--terrain in America. After he crossed the Rockies, a nagging...