Some people get very worked up about the very low risk (deaths per head of population) of terrorism, yet seen quite happy with the high risk of, for example, dying in a road accident (especially in the USA).

I couldn't help but laugh at a friend panicking about her trip to Paris yesterday. She's terrified of this minute risk, yet is perfectly happy with the risk of her sedentary lifestyle and incredibly unhealthy diet. It won't be the terrorists that don't see her past 50