I guess this means that counter espionage is invariably shit? Because the Brits graciously donated Klaus Fuchs[1] to the project, and that was after having him

I guess this means that counter espionage is invariably shit? Because the Brits graciously donated Klaus Fuchs[1] to the project, and that was after having him interned at first. To be fair tough, Fuchs made important enough contributions that the Manhattan project might well have been too late to bomb japan before the war ended. [1]: https://en.wikipedia.org/wiki/Klaus_Fuchs https://en.wikipedia.org/wiki/Klaus_Fuchs