I'd like to ask something. Is it leaking information if the information is commonly known? It is said in this article that Snowden leaked information that is a

I'd like to ask something. Is it leaking information if the information is commonly known? It is said in this article that Snowden leaked information that is appropriately done by the NSA as part of their charter. The direct quote: Whatever one’s views of U.S. foreign policy in those parts of the world, these activities are legitimate aspects of the NSA’s charter If this is the case, as in these activities are specified in the NSA's charter, then there can be no harm with talking about them publicly right?