Over at the Polk County News Blog, Billy Townsend writes about the new security measures at the Polk County Courthouse. Here's one interesting tidbit:

The first layer consists of four “puffer” machines, which buffet a person with jets of air meant to scatter any explosive residue into the air so that the machines’ sensors can detect it, thereby thwarting would-be bombers, in theory. The machines cost $100,000 per unit and were paid for by the Polk County taxpayers through the County Commission.

Yep, that's a total of $400,000 for the 'puffers'.