Rolling Stone's Michael Hastings, still in Afghanistan, told NBC that it all started with the eruption of Iceland's Eyjafjallajokull volcano -- which prolonged Hastings' time with McChrystal and his team. The ash cloud forced the general to take a bus from Paris, where he celebrated an anniversary with his wife, gave a speech. and met with French officials, to Berlin.
We also learned from Hastings' story that McChrystal's favorite beverage is Bud Light Lime, so we can only assume the bus was well stocked. The real question is where in Paris would one procure such a wondrous delicacy (and which foul-mouthed staffer's job it was).