When did the homeland security levels get plus modifiers?
I don't remember the levels having "plus" and "minus". When did this happen? See, in Massachusetts, we like things to be NUANCED.
The MBTA raised its security level from Code Orange to Code Orange-plus yesterday after a second wave of bombings in London, adding transit police and personnel to station platforms, making more safety announcements, and searching commuter rail and subway trains with sniffer dogs.