Senior ManagerMalaysian Airlines' flight MH17. Over 300 passengers and crew members were killed with no survivors after a missile collided with the aircraft. But the question on everyone's mind now is: How did this happen? The plane was flying over the Ukraine a mere twenty miles from Russia when it went down. Ukraine and Russia are in the throes of a battle royale; so either nation could arguably be at fault. However, sometimes it simply comes down to the physics and science of the situation. The key factor being altitude. When the passenger craft was struck, it was roughly 10,000 meters (approximately 32,808 feet) in the air. Typical surface-to-air missiles that have previously been recorded by Ukrainian separatists have never reached anywhere near this height; particularly the Strela-10 vehicle and the Igla shoulder-fired rocket. Russia, however, has several weapons at its disposal; specifically the BUK missile system, that can easily reach a target flying that high. What does that mean? Well, according to The Straits Time/Asia, it means that all circumstantial evidence points to Russian culprits. Just last month, Russian rebels residing in the Ukraine claim to have "captured" some of the BUK ground-to-air weapons (though the Ukraine has never officially reported these thefts). In comparison to the short-range missiles mentioned above, the BUK systems, also known as the SA11, are "big but highly mobile, and can reach to altitudes of 14km" (roughly 8.7 miles). Despite all of these factors, however, it behooves us to point out that, even if the Russian rebels did have the SA11s in their possession, they could not be operated without intricate radar systems necessary to pinpoint a moving target with any accuracy. Another reason Russia seems to be the logical assumption for blame is that the Ukraine has yet to even activate their air defense; despite the ongoing unease and tension in its realm. Such is not the case with the ethnic Russian rebels. In fact, they've been charged with the obliteration of at least six prior Ukrainian helicopters and military aircrafts. They even went so far as to levy a "no-fly zone" over the portion of Ukraine where MH17 fell to its death earlier today. Even more damning is the fact that, at the same time MH17 took its final plunge, Mr. Igor Strelkov, the local commander of the ethnic Russian rebels, triumphantly announced via Russian-speaking websites that his "soldiers" had successfully destroyed a Ukrainian transport plane; though no such crash has been reported. It stands to reason that what the ethnic Russian rebels took for a Ukrainian vessel was in fact Malaysian flight MH17. With the immense advances in technology and already stringent scrutiny on the Ukraine, it won't be long before the US and other Western nations are able to pinpoint the missiles exact launch point. This week already Nato published clips featuring Russian missiles being launched into Ukraine territory with its focus on Ukrainian airborne vehicles. Global action is inevitable. Even nations that have thus far been reluctant to file sanctions against Russia or get involved in their beef with the Ukraine will not be able to turn a blind eye to hundreds of innocent victims being caught in the crossfire. Even Vladimir Putin, Russia's President, won't be able to ignore this crisis. And, even if he wanted to distance himself from the rebellion; their access to complex missile systems forces him to cooperate in some capacity. At this point, the only thing we know for certain is that, what may have seemed like a small, "not-our-problem" issue a few days ago just got really big, really fast. The global implications of what happened today could be, and most likely will be, catastrophic. We're all in this now.