Russia is not in a position to bar investigators, it’s not on their soil.
You're an idiot.
Look Ivan, their lackeys are the ones who control the crash site.
Really? Does the Kremlin know you don't think Eastern Ukraine is part of Russia? Unlike Crimea, Transnistria, Nagorno-Karrabakh, Abkhazia, South Ossetia...? Feel free to retract this post, when ITAR-TASS puts out a communiqué tomorrow ordering operatives to emphasize Russia's longstanding "ownership" of "Novorossiya"...
I can't tell if you are joking or incredibly naive.