He went after the toughest targets , heavily defended German Drachen observation balloons .
America 's second ranking ace in World War I , Frank Luke embodied the reckless and undisciplined image of a fighter pilot of the time .
Frank Luke went after the toughest targets , heavily defended German Drachen observation balloons .
America 's second ranking ace in World War I , Frank Luke embodied the reckless and undisciplined image of a fighter pilot of the time .