At last, the weather is starting to warm up, providing more of an incentive to get out for a walk, or maybe even a bike ride.  On this week’s Cityscape, we’ll talk with a guy on a path to walk every street in New York City, and another guy who biked his way from Brooklyn to Hudson Falls – 500 miles away.  Tales from that journey are captured in a new book -- Conversations on the Hudson: An Englishman bicycles five hundred miles through the Hudson Valley, meeting artists and craftspeople along the way.