Viewing Terror Dispassionately

TW: Certainly terrorism retains symbolic impacts challenging to define by cold hard numbers. But at some point I would hope Americans could, unlike its MSM media, foil terrorism by not fixating and obsessing about it. This weekend's coverage has been ridiculously overwrought and self-absorbed...as usual. No doubt the coming week will add the spice of partisan demagougery.

From Nate Silver at 538.com:
"...Over the past decade, there have been, by my count, six attempted terrorist incidents on board a commercial airliner than landed in or departed from the United States: the four planes that were hijacked on 9/11, the shoe bomber incident in December 2001, and the NWA flight 253 incident on Christmas.

...Over the past decade, according to BTS, there have been 99,320,309 commercial airline departures that either originated or landed within the United States. Dividing by six, we get one terrorist incident per 16,553,385 departures.

These departures flew a collective 69,415,786,000 miles. That means there has been one terrorist incident per 11,569,297,667 mles flown. This distance is equivalent to 1,459,664 trips around the diameter of the Earth, 24,218 round trips to the Moon, or two round trips to Neptune.

Assuming an average airborne speed of 425 miles per hour, these airplanes were aloft for a total of 163,331,261 hours. Therefore, there has been one terrorist incident per 27,221,877 hours airborne. This can also be expressed as one incident per 1,134,245 days airborne, or one incident per 3,105 years airborne.

There were a total of 674 passengers, not counting crew or the terrorists themselves, on the flights on which these incidents occurred. By contrast, there have been 7,015,630,000 passenger enplanements over the past decade. Therefore, the odds of being on given departure which is the subject of a terrorist incident have been 1 in 10,408,947 over the past decade. By contrast, the odds of being struck by lightning in a given year are about 1 in 500,000. This means that you could board 20 flights per year and still be less likely to be the subject of an attempted terrorist attack than to be struck by lightning..."
http://www.fivethirtyeight.com/2009/12/odds-of-airborne-terror.html