I find it really interesting that a huge number of GCHQ internal training documents, giving away an awful lot about their operations and systems, was available

I find it really interesting that a huge number of GCHQ internal training documents, giving away an awful lot about their operations and systems, was available on demand with no logging to poorly vetted contractors at US sites. They don't even know what he took. Contractors like Booz Allen Hamilton are a huge, soft target with a constantly changing roster of workers. That lack of any significant firewall between the allies, combined with a huge army of contractors in the US with top secret access, means China/Russia etc have probably had access to this information for years, if not decades, and could feed CGHQ and the NSA misinformation at will, because they'll know exactly what their capabilities and aspirations are.