What "Thread Level" systems do other countries use?
February 1, 2005 6:31 PM Subscribe
Some "Threat Level" questions: do countries have a similar system? Are other countries planning to implement such a system? Also, is the American system based on an existing model? I'm not so interested in the threat aspect of it as much as I'm interested in learning where the color-coded system originated and if it's being borrowed. This version, I'm certain, was a later iteration.