COVER STORY 'RED' ALERT One man's "fear-mongering" on terror is another's "preparedness," but clearly the threats are taking their toll on the nation's psyche—particularly as Americans consider the possibility of terrorist retaliation after the first shots are fired in Iraq. But a plainspoken, ex-Army Sarge suggests that Americans put away the duct tape and plastic wrap and calmly learn to stay safeBy Lynn VincentAmerican policymakers and members of the United Nations debating society are not the only ones talking about VX nerve gas, anthrax, and other terrorist weapons. On a Southwest Airlines flight out of Phoenix last week, two couples,...