Ray Brooks definitely was the last USAS ace known living. The previous two were
George Vaughn (31 Jul 89) and
Douglas Campbell (16 Dec 90). Ray seemed so frail, especially compared to Vaughn who was so hale and hearty, that that it was a real surprise when he outlived the others at age 95. At the time of Ray's demise we thought he was the last of all US Great War aces but Dolphin pilot
James Pearson died in Jan. 93 and we didn't learn about that for quite some time. He was 97.