King, I agree--complicit in the sense we did not warn Diem. That's somewhat less complicit, I think, than Nixon in the case of Allende. Nixon did not order him killed, but he did order CIA to "destabilize" the country, which resulted in the coup that brought Pinochet to power. (CIA told Nixon they could not guarantee the outcome of the "destabilization".)

Postoak, there were indeed a bunch of Soviet agents in the US government during WWII--including some in OSS. McCarthy was not entirely wrong about the Commie threat, but he painted with far too broad a brush.