It was the day the Russia-Ukraine crisis went global, claiming the lives of nearly 300 people from at least 12 nations spanning across five continents.
Details are still emerging about the downing of a Malaysian Airlines passenger jetliner in eastern Ukraine on July 17, apparently by a surface-to-air missile.
But the circumstantial evidence is mounting -- and appears to point to separatist culpability.
And what had been a localized conflict has suddenly, and dramatically, become a major threat to international security.
Will the downing of Malaysian Airlines Flight MH17 be a game changer in the months-long conflict between Russia and Ukraine? And if so, how?
On the latest Power Vertical Podcast, I discuss this issue with Mark Galeotti, a professor at New York University, an expert on Russia's security services, and author of the blog "In Moscow's Shadows;" and Kirill Kobrin, editor of the Moscow-based history and sociology magazine "Neprikosnovenny zapas."
Listen to or download the podcast above or subscribe to "The Power Vertical Podcast" on iTunes.