Your vote on this answer has already been received
If the nation escalates to "red alert," which is the highest in the color-coded readiness against terror, you will be assumed by authorities to be the enemy, if you so much as venture outside your home. A red alert would also tear away virtually all personal freedoms to move about and associate. The government agencies would run at a very low threshold. The state police and the emergency management people would take control over the highways...!