So, we bounced back up to "high-alert" Code Orange this week in anticipation of war with Iraq and with a certain sense of deja vu. Courtesy of federal homeland-security officials, our post-September 11 world has been cast only in hues of yellow and orange-yo-yoing between the two. The highest level, red, is too scary, so we had to drop down to yellow in order to have room to rise fairly comfortably as war neared. But why do we have five colors on the terrorism-threat warning chart, if only two are going to be used? Is this week's orange any different from February's orange?