Service squadrons performed maintainance and some administrative duties. Composed mainly of ground personnel. Also, the fighting on Iwo Jima was almost over when the first B-29 landed and the island was fully-secured by the time air corps units had all three airstrips operational. Wings on his tunic doesn't necessarily indicate flight status - many underwent flight training only to later find themselves occupying administrative, service and support billets. Not to detract from his role; ". . . they also serve who stand and wait".