The CNN story on the Invision machine was true, but misleading. Firstly the report by the Inspector General to Congress was politicaly biased. Secondly the false alarm rate is reported as higher in the field than during FAA testing but...
- it is still by far the lowest false alarm rate in the entire industry, so is only high relative to the testing no other machines.
- reportedly the data is from an unusual case where the machines where not used on typical bags.
Also the story left out the fact that the same report recommended a federal funding level of $100 million/year for the next 6 years for airline baggage security. Of this the bulk will probably go to EDS certified systems. For fiscal '99 that leaves only Invision, although L3 may have succeed in getting certs next year (although I believe they've failed 3 tries now).
Anyway if you want to learn more about the aviation security industry, there are some good posts on the INVN, VVID, and ALOG sight.