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In the last decade, according to statistician Nate Silver, there has been “one terrorist incident per 11,569,297,667 miles flown [the] 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.” (Sadly, this does mean that in the future we can expect one out of every two round-trip flights to Neptune to be hijacked.)
