During flights, do you fidget excessively, sweat a lot, get flushed skin, tremble, maintain a cold penetrating stare, or repeatedly use the lavatory? Have you lost a lot of hair or gained a lot of weight since you took your license or passport photo? Well, first of all, we have a lot in common. Second, it’s possible you’re being watched as “this is just some of the information that federal air marshals collect on thousands of regular US citizens under a secret, domestic surveillance program.” (I realize this news is unlikely to make you fidget, sweat, or have to use the restroom less often.) From the Boston Globe: Welcome to the Quiet Skies.