I'm ashamed to admit that the incident in Bldg 197 absolutely did influence my carry habits. It made me realize that I've gotten very lax and spend way too much time in the white zone...and there really is no such thing. So I'll go back to the good habits and let the tragedy be my wakeup call.
I think this will be a lasting reminder. I work in Bldg 197 and my office is off the atrium where the shooter was firing. I could have walked out of my door and seen him. I wasn't in the building when it happened, but if he had chosen to aim one floor higher, he would have had my entire staff in his sights. That's very sobering. Fortunately, every one of them escaped safely.
So now I'm faced with the question: what do I do when I'm in the victim zone of the "secure" facility? The letter opener on my desk doesn't look like much of a response to an active shooter, but it may be all I have. You can bet that when they let us back into the building, I'll be scoping out options for improvised weapons using what's available. So while not exactly a change in my "carry" habit (since I'm already disarmed), it will definitely be a change in my awareness and mental process.