Like many of us, I think, it's hard to believe it's been ten years since the attacks of 9/11. We got a frantic wake-up call from our friend Steph to go turn on our TV and watch the news because some "crazy shit was going on". We saw the first tower billowing smoke and then watched in horror to see the second plane crash into the other tower. It's still stunning to think about.
I went into the office to make sure all of my team was accounted for (we had people travelling to the East Coast at the time). It was really scary since no one knew if there were other attacks coming, and Microsoft was a relatively high profile US target. Michelle didn't want me to go, and in introspect, I probably should have stayed home with my family. Fortunately, of course, we were OK, and all of the Microsoft employees were safe.
Security on campus changed after 9/11. We've always had cardkeys, but after 9/11 it was mandatory that we wear them visibly, and we stopped being able to receive personal packages at work. These have relaxed a little in the intervening years. However, we still have the required parking permits on our cars that started after 9/11.
Pretty quickly after 9/11, flags went up everywhere, including at our Redmond West campus. Hopefully, we never have occasion to fly the flag like this again.