information and not give them the 'key', but yet guarantee that the key would become available if something happened to the person.
I have no idea what Snowden has done, but it is possible that he has a communication set up and ready to go automatically, but stopping it requires a regular effort on his part (or someone else) to keep it being delayed.
If he disappears for long, all that information could be in the hands of many, knowing it's going to come out and all wanting to be the first.
If I've wondered about this walking my dog, I'll bet the NSA has given it some time as well.
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