Patrick Smith ("Ask the Pilot") wonders why we still can't get airport security right:
[T]he primary threat to commercial planes is, was and shall remain explosive devices. The Sept. 11 skyjack scheme is today unworkable for a variety of reasons. Yet those who run airport security refuse to acknowledge this, wasting time and resources ransacking people's luggage for what are, in effect, harmless items. Has anybody at the Transportation Security Administration bothered to peruse the air crimes annals of the past 50 years? The agency, along with too many Americans in general, seems to exist in a world that did not begin until 2001, oblivious to the long record of terrorist sabotage against civilian airliners.
My ranting on this topic might be redundant, but remember there are hundreds of lives, and tens of billions of dollars, at stake. A bombing, or multiple bombings, would be devastating to the U.S. economy and possibly catastrophic for the airline business. In the past, airlines were able to pull through after incidents of sabotage. People recoiled in horror, but they didn't stop flying. Nowadays our mind-set is very different. We are, I'm afraid, more predisposed to panic and rash behavior.
The entire column is worth a read.