Complete the following sentence: On 22 September, while serving on lifeguard station in Subic Bay, "Haddo" rescued Hollis Hills, a US Navy pilot shot down by antiaircraft fire. Hills was an American who joined the Royal Canadian Air Force before the United States entered the war, after which he joined the USN. <unk> <unk> <unk>
1942<unk>,<unk>he had become the first P-51 pilot to shoot down an enemy aircraft.