Many of us unlike most of the world work military aircraft all the time for normal transit as well as military ops and other sorts of things.
You guys crack me up! I work YOUR B1s, U2s, UAVs, A10s, P3s, fighters, tankers, transports- all in a war environment- everyday. So it's histerical that you think citizenship is important for that!
But I get the picture of what is causing your shortage ie. it's not a lack of bodies. Oh well, at least the US isn't the only place with an age bubble!