I'll be holding my breath over New Years...
A major opportunity for an attack.
The last time I was this worried was the first Fourth of July after 9/11, and I was travelling with my family. Had a geiger counter and dosimeters in the back while travelling through Reno and other spots, as I figured the most likely next attack would be a dirty bomb. Nothing came of it, and we enjoyed fireworks in the town of Wendover on the border between Nevada and Utah. The border runs right through town, is marked on the ground, and casinos crowd up against it like pigs against a fence.