In this fantastic bit, they discuss airport security with expert Bruce Schneier:

Inherent in the obsession on liquids and gels, Mr. Schneier said, “is the notion that we can stop the bad guys by focusing on tactics, which is moronic. I pick a defense, you see my defense, and then you, the bad guy, decide what to do. That’s a game we can’t win.”

He added, “Screeners are so busy looking for liquids that they’ve missed decoy bombs in tests. We’ve defined success so weirdly. When T.S.A. takes away some frozen tomato sauce from grandmom because it might become a liquid, they think of it as a success. But that’s a failure. It’s a false alarm.”

(Local copy, since NYT rots links.)