I've said it before, and I'll say it again: I've traveled around the world, walked in some dodgy areas, been in unsafe places, but it was only in the United States, the supposed most civilized country on Earth, where the fear of getting caught in a shooting entered my mind.
Sometimes, while visiting the States, I'd go somewhere, a public place like a restaurant, and wonder if we're all just sitting ducks for some lunatic with a legally-purchased gun. In New York this summer, where I spent 4 days to see a pair of U2 shows, I'd walk in somewhere and immediately take note of all the exit points, just in case I needed them. I'd formulate a plan of escape in my head.
Now you tell me if that's rational or not. I would submit to you that it's not. But that is where we are in the U.S. in 2015, and it's only getting worse because of inaction from so-called political leaders.