Peter Bergen: Homeland Security has been stuck at yellow since Jan. 9, 2004. He says the system is broken because of complaints from the public. The new, targeted threat level change is a sign that the system can be tweaked and made effective after all, he says. No one seems to know what to do when the nationwide level is raised, anyway, Bergen says. No one in the private sector even those who say they control critical infrastructure seems to be aware of vague orange alerts.”]
Source: https://www.csoonline.com/article/2117298/color-us-yellow.html