Clarence O. Mack, seaman, isserving aboard the U.S. AttackTransport USS Rockwall, w was recently honored for contributing 100 per cent to the Armed Forces Blood Donor Program.The ship, which is undergoing repairs at the Philadelphia NavalBase, is the sixth to have received the coveted Red Cross 100 per centparticipation pennant. This pennant if awarded only to ships whose every physically able man aboard has contributed at least one pint of blood to the Armed Forces Blood ProgramMack in the husband of the former Virginia L. Looney Mack of 1611 McCurry Ave.