For those other sources of information. I should remind you about the following: > The cheaper to produce, the cheaper to use it for propaganda. A video docum

For those other sources of information. I should remind you about the following: > The cheaper to produce, the cheaper to use it for propaganda. A video documentary with witnesses, CCTV footage, interviews and people identifiable as the researchers/KGB agents, documents tracing them, ... Makes perfect sense as source of information. Additionally, you should realize that the US releases information to deter Russian action. If it doesn't happen, the odds are in their favor that they actually succeeded ( we'll see, since they release satellite imagery regularly). As such, Satellite imagery backed claims of US > claims of Russia. You shouldn't fix that date as an absolute. It's a current best guess estimate. You should know this by simple logic reasoning, so I'm just stating the obvious here.