By Becky Chanis, Magazine Intern Few interns get to say their summer job required them to bike more than 200 miles in a single week. Perhaps even fewer can say they asked to do it. Luckily, I am one of those few. On July 16, 2010, I packed two duffel bags and joined the staff of Rails-to-Trails Conservancy (RTC) for the 8th Annual Greenway Sojourn in Camden, N.J. For one week, it would be my job to cycle from Camden to Jim Thorpe, Pa., and back again with a group of more than 300 Sojourners, experiencing...