Last week, our Kyiv-based colleague Mark Raczkiewycz reported that the international probe known as the Joint Investigative Team (JIT) had determined that a Buk anti-aircraft missile system used to shoot down Malaysia Airlines Flight 17 (MH17) over eastern Ukraine on July 17, 2014, had come from Russia. After “extensive comparative research,” the JIT said it concluded the Buk came from a Russian military base in Kursk and belonged to the 53rd Anti-Aircraft Missile Brigade. That finding was announced as the investigation enters its last phase, according to Dutch prosecutor Fred Westerbeke, who cautioned that much work remains to be done and it is not possible to say when the JIT will be ready to name actual suspects. The JIT, it should be noted, comprises authorities from Australia, Belgium, Malaysia and the Netherlands, all of which had passengers on that ill-fated flight, and Ukraine, on whose territory the downing occurred. It is led by the Dutch, because the flight originated in Amsterdam and two-thirds of those killed were from the Netherlands.