Sonny Abesamis/flickr On The Job is a series of conversations with the people who keep neighborhoods running.
Name: Donald Clark
City: Washington, D.C.
Donald Clark spends his days teaching high-school U.S. history, and moonlights giving tours of D.C.'s iconic monuments to visitors packed into his $5,000 neon yellow pedicab. “I needed a part time job during the recession,” he says. “I'd...