They teach Baltimore youths to fix bikes — and change perspectives in the process

Every Thursday afternoon like clockwork, a group of teens in orange aprons huddles around a collection of brightly colored bikes next to a skate park at the city’s Inner Harbor. Two of them are snapping the front derailleur of a blue two-wheeler back into place so the rider can change gears. Another group is swapping a torn brown leather seat for a freshly covered black one.