That's a really important question.
CSIS and CSE, as I said, have significant holdings, not all of which, by a long shot, are released to officials like me. What they do is that over time, using the techniques they need to keep highly secure to protect both the methodology and sometimes individuals, they continue to collect. Often the action taken out of a single piece of intelligence is to continue to collect.
Within CSIS, they have a process where they analyze what they're going to release and what they're going to continue to investigate and just hold. I think it's fair to say that they try to release things that are pertinent to the geopolitics of the period in time, or relevant to other investigations and other concerns by government, but it is an art rather than a science.