Watch scenes from a June 15 press conference at Washington Hospital Center when kidney donors and recipients, some relatives and some strangers, met after the largest kidney donor exchange ever. Doctors said they called the 14 transplant recipients “the Prodigal” because many of them could not find a compatible donor and so were not going to get kidneys through traditional waiting lists. But because of the exchange program they were able to return to the hospital for transplants and, like the Prodigal Son, a second chance.