National Geographic : 1948 Jan
Fun Helped Them Fight A Flying Tribute to Its Builders and Ground Crew Was "Nine O Nine" This B-17 flew more than 100 missions. Its name came from the last three digits of its serial number. At an English base a ground-crew man adds another bomb to the rows signifying missions completed; others work on chin turret and engine. With peace, thousands of such craft became winged white elephants.