From Jesus Diaz @ Gizmodo:

After the crotchbomb there has been a lot of noise about airplane security again—you can see how stupid the leaked new flight rules are here. But what’s the actual risk of an airplane attack? Here’s the definitive chart: http://gizmodo.com/5435954/the-true-odds-of-airborne-terror-chart

The stats are from Nate Silver at fivethirtyeight.com