NATO foreign ministers have agreed to suspend all practical civilian and military cooperation with Russia, in response to Moscow's annexation of Crimea. NATO will also review military deployments in eastern Europe.
Pro-Russian separatists claim the latest plane downings are just one victory of many to come. The incident has not only heightened tension even further, but also hindered the investigation at the crash site of Malaysia Airlines flight 17.
Russia says its soldiers aren't fighting in Ukraine, but evidence keeps piling up that Russia has invaded — even in Russia itself. That's caused some protests in Russia and disappointment in Ukraine, where people are feeling abandoned by the outside world.
Russia may have violated an EU-brokered truce aimed at ending the six-day conflict with Georgia, and there were reports that Russian tanks rolled into the Georgian city of Gori, as Lisa Mullins gets the latest from the BBC's Gabriel Gatehouse.