Charlotte is known for its trees. Its tree canopy covers about 47 percent of the city. Don McSween has been a big part of growing it. For 33 years, he was in charge of maintaining and protecting the canopy as city arborist. He just retired, and on his last day on the job, McSween invited WFAE's Marshall Terry to go with him to one of his favorite tree spots in Charlotte: the line of oaks that hover over Tryon uptown. There we talked about his time as arborist and how he got into the work.