Threat Level ORANGE -- What Shall I Do?

I am in the airport heading back East.  As I made my way through security, I yet again heard the truly pointless announcement "Please be advised that it is National Threat Level Orange."  Oh no.  Threat level ORANGE.  That sounds bad.  I had better do something about that.  Since I was passing by the Information Desk at that moment, I stopped and asked the elderly gentleman working the desk, "It's threat level ORANGE -- is there something in particular that I should do differently?"  He looked at me and said "What?"  I repeated the question as earnestly as I could.  He looked a combination of incredulous and completely confused and said, "no."  That didn't strike me as a very satisfying answer, so I just looked at him intently, hoping he would come up with some other powerful anti-terrorist strategies.  After an akward second, he decided to give me some more information.  He said "just keep an eye on your bags."  So that's what I'm doing.  I'm staying "Threat Level ORANGE" vigilant and keeping a careful eye on my backpack.  No one is going to sneak their toothpast into my bag if I have anything to do with it!