So the question is what they could download before getting caught... each time....
Also another possible threat scenario would be a spearphishing attack that would plant a virus on the network which would slowly (in botnet fashion) access pieces and send it to China a little bit at a time, uncoordinated, many little connections inside the network.
Ask yourself, if you had unlimited funds, spies in the US, and so forth, how would you attack the NSA? Those resources make a sophisticated and successful largescale attack a lot more possible and feasible.
Also another possible threat scenario would be a spearphishing attack that would plant a virus on the network which would slowly (in botnet fashion) access pieces and send it to China a little bit at a time, uncoordinated, many little connections inside the network.
Ask yourself, if you had unlimited funds, spies in the US, and so forth, how would you attack the NSA? Those resources make a sophisticated and successful largescale attack a lot more possible and feasible.