So how long has Glen Greenwald and others with access to the Snowden cache known about this? There was only one Snowden cache. If the document was provided by

So how long has Glen Greenwald and others with access to the Snowden cache known about this? There was only one Snowden cache. If the document was provided by Snowden, did we hear about it earlier? Who has access to the Snowden cache now? Do we know?