Thursday Maxim: Organizations and security managers will tend to automatically invoke irrational or fanciful reasons for claiming that they are immune to any postulated or demonstrated attack. Comments: So named because if the attack or vulnerability was demonstrated on a Tuesday, it won’t be viewed as applicable on Thursday. Our favorite example of this maxim is when we made a video showing how to use GPS spoofing to hijack a truck that uses GPS tracking. In that video, the GPS antenna was shown attached to the side of the truck so that it could be easily seen on the video. After viewing the video, one security manager said it was all very interesting, but not relevant for their operations because their trucks had the antenna on the roof. Compiled by Roger G. Johnston, Ph.D., CPP, Argonne National Laboratory