When I was a Federal Air Marshal (FAM), two things were always in my mind: judgment and precision. Judgment as to when and who to shoot; precision in shot placement.
A gunfight in an airplane is much different from a gunfight on the ground. The consequences of a mistake are much graver. If a shot goes astray, it's not just one or two innocent bystanders getting hurt or killed-it can be 400 innocent passengers. That's why the FAM program once had the highest shooting qualification standard in federal service.
No more. After 9-11, training has fallen by the wayside. The training academy itself once consisted of 14 weeks of specialized training at the Federal Law Enforcement Training Center. Now if you have any previous law enforcement experience, the program takes one week. If you don't have any experience at all, it takes five weeks.
I served proudly as an Air Marshal, but I know we had our limitations. In the 17 years of the program's existence, no Federal Air Marshal has ever arrested anyone. Nor shot anyone. Nor displayed a weapon to control a situation.
That doesn't mean the FAM program didn't do anything. There's clear evidence that Air Marshals have been a significant deterrent to hijackings and acts of terrorism. However, the inexperience of most Air Marshals is a compelling argument for letting police officers carry their weapons into the cabins of airliners. The average big city patrol officer arrests and controls more people in a day than the entire FAM program has done since its inception.