Sitting in a meeting room in Vancouver. My family was all in the UK, where we lived at the time. Three of us had arrived a day early as the meeting organizers, and we were awaiting 12 more, all of whom were supposed to be en route. Nobody was hurt, but nobody else made the meeting, all the flights were turned around mid air. We undid the corporate blocks on streaming video (we had all the IT team there) and watched it all morning. There was a steady stream of diverted planes coming into YVR, and some excitement when a couple of them couldn't be identified over the radio, with fighters escorting them in.

YVR looked like a parking lot, planes everywhere.

Got home to the UK on the Friday via Heathrow, first flight out of YVR to the UK that week. I was back at Heathrow the next day to get my wife on a flight to Vancouver for a family emergency. Heathrow was like an armed camp, more so than when I had landed earlier. That made a strong impression, that it wasn't just in the US, but rather how far the effects went and how quickly.

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2007 X3 3.0si, 6 MT, Premium, White

Retired:
2008 535i, 6 MT, M Sport, Premium, Space Grey
2003 X5 3.0 Steptronic, Premium, Titanium Silver
2002 325xi 5 MT, Steel Grey
2004 Z4 3.0 Premium, Sport, SMG, Maldives Blue