Losing life to terrorism on Installment basis

Every time you travel by air in the US, you give up an additional 10-30 minutes to additional security - meant to foil terrorism. You gain confidence in the safety of your air travel. In exchange, how much of your life are you giving up? And, how much is the country as a whole giving up?

Last year, the top 6 airlines in the US carried 600M passengers. If each passenger spent an additional 15 minutes for these measures, then the total amount of time spent was 600 times .25 hours, or a total of 150 million hours.

Normal life-span in the US is 78.4 years, which translates to 686, 784 hours.
150 million hours translate to 218* lives.

Every year, therefore, we are losing 218 lives to terrorism-related measures. They just aren't 218 individuals. Instead, this loss is spread out over all of us - 300 million US population.

Worth it? You be the judge. If a single terrorism-related incident were to take 218 lives, there would be a huge hue and cry. But, we are willing to accept this loss of the equivalent 218 lives on a sustained basis, year in and year out. On the other hand, would you take a .7 times 10 to the -6 chance of losing your life, rather than subject yourself to intrusive security every time you fly in the US. My personal answer is no. Just like I give away part of my earnings to life insurance, I also give away part of my life to safety.

At the individual level it makes sense. It is at the society as a whole that we worry about. Is this worth-while for the society?
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* The number 218 is surely an underestimate. We have taken only the top 6 airlines of 2010. There are many other airlines in the US. Security measures are taken on not just US, but foreign airlines too, and US passengers are subject to similar measures when traveling outside the US.

In addition, a proper analysis will include the economic cost of these anti-terrorism measures. This includes the cost of hiring staff, equipment, and what the passengers have to do (buy supplies in smaller containers, throw away water bottles etc.).