Lieutenant Luke of the 27th Squadron during September became the American Ace of Aces for the time being. From 12 to 29 September he gained eighteen victories. He shot down fifteen balloons and three planes. Joining the Group on 1 August, he had gained one victory on the Chateau Therry front which never was made official. On 18 September, he brought down two balloons and three planes in a period of less than 10 minutes. On 29 September, he was reported missing in action. He had dropped a note to one of our balloons asking them to be on the watch for burning balloons. Twenty minutes later he burned three enemy balloons but did not return from his mission.