We don't know what the extent of the population is beyond these two.
It's something of a frustrating issue. The public thinks not enough is being accomplished. I don't know if we'll ever be able to declare it clean.
Because you can detain a person without trial, without time limit, to answer question to which they could not possibly know the answer, and punish them for not knowing,
Now many might not agree with that decision but it was a decision which demonstrated a considered approach.