But on which place of your personal risk scale is the probability of getting caught in a terrorist act?

Me personally? Not very high because I live in the sticks :). But ask the people of Paris before November 13th or the people in San Bernadino before December 2nd. I am sure that none of them thought that they would be victims either. Life is risky in lots of ways - and getting panicked is what the terrorists want.

How much of your tax dollars are needed (home and abroad) to keep that probability low?

I honestly don't know. But I think that if we are going to be involved abroad, we need to take decisive action, destroy their caliphate and get out. At home, I think that the background checks on people coming in to this country need to be stronger. For example, all they had to do before granting Tashfeen Malik a K1 visa was to check her facebook page - that would have been enough to deny the visa. But these PC idiots said that checking her out on social media would have been too intrusive. Political correctness may be the death of us - literally.