A journo’s question: Reports on post-2014 Karzai still single source, right?

I have to admit that I really have no idea which version is the correct one. Is Afghanistan’s president Hamid Karzai ready to retire after 2014, as he told Spiegel magazine? Or is he willing to use tricks to extend his grip on power as a leaked documents by Germany’s intelligence service Bundesnachrichtendienst (BND) allegedly suggests?

But there’s one thing I know from a journalist’s point of view: When the German tabloid Bild reports on the secret BND document, and then the British Telegraph reports its reporter has seen the BND document – that makes it still one BND document both papers are reporting. So it still would call this single source. Let’s look for a second one.