Altra prova di disperazione.
Il portavoce della Casa Bianca, Josh Earnest, dice esplicitamente che le loro "informazioni" sono basate su foto e video tratte dalle reti sociali:

Q Has Russia moved multiple launch missile systems across the border into Ukraine?

MR. EARNEST: Well, Bill, I’m not able to give you the latest intelligence assessment. We have seen a pretty strong track record, and there’s ample evidence to indicate that there has been, unfortunately, a steady flow of heavy weapons across the border from Russia into Ukraine and into the hands of these Russian-backed separatists. We continue to be very concerned about that. We do know that it was an SA-11 system that was in the hands of separatists that brought down the Malaysian airliner last week. We know that Russia had been involved in training separatists to use that system. And that is why the Russians are responsible for that and why the international community is now focused on isolating the Putin regime and getting them to change their behavior in Ukraine.

Q There were apparently one or more systems moved close to the border earlier. It’s not somewhere around after 10:00 p.m., and they thought they might move them over today. And I wonder whether you knew that.

MR. EARNEST: I’m not in a position to offer a specific detailed intelligence assessment about today’s movements of heavy weapons.

Q Is there firing across the border in either direction?

MR. EARNEST: We have seen in the last couple of days, according to some social media reports but also to some intelligence assessments that have been released by the intelligence community, reports that there has been firing of Russian heavy weapons from the Russian side of the border at Ukrainian military personnel. We have detected that firing, and that does represent an escalation in this conflict. I know that the Pentagon and the State Department both talked about this a little bit yesterday, but it only underscores the concerns that the United States and the international community has about Russian behavior and the need for the Putin regime to change their strategy.

http://www.whitehouse.gov/the-press-office/2014/07/25/press-briefing-press-secretary-josh-earnest-072514

Dunque, ricapitolando. Accusano i russi non solo di aver abbattuto, direttamente o indirettamente, MH 17, ma di continuare a trasferire armi dalla Russia alla parte orientale dell'Ucraina. E su quali basi?
1) reti sociali (se uno segue i forum di aviazione, TUTTI i video e le foto sono stati uno dopo l'altro debunkati) e
2) fantomatiche informazioni di intelligence che naturalmente non si degnano di presentare.

Conclusione: è così perché lo diciamo noi.