Via Bruce Schneier:

Air marshals are being arrested faster than air marshals are making arrests.

Actually, there have been many more arrests of Federal air marshals than that story reported, quite a few for felony offenses. In fact, more air marshals have been arrested than the number of people arrested by air marshals.We now have approximately 4,000 in the Federal Air Marshals Service, yet they have made an average of just 4.2 arrests a year since 2001. This comes out to an average of about one arrest a year per 1,000 employees.

Now, let me make that clear. Their thousands of employees are not making one arrest per year each. They are averaging slightly over four arrests each year by the entire agency. In other words, we are spending approximately $200 million per arrest. Let me repeat that: we are spending approximately $200 million per arrest.