This week on Car Talk, a case worthy of Jack Bauer. Karen in Maryland has noticed that her tire pressure warning light flashes every day during her commute, in the same location. Is it just a coincidence that it happens right in front of an NSA building? Or are her tires transmitting state secrets? Also, Paul in Texas frets that his Sebring has begun to sound like a diesel VW, Simon in Arizona finds a $2000 brake job hilarious, and could Katie in Alabama have avoided a lot of problems by simply naming her Camry? All this, plus a Puzzler from the Teen Driving series, this week on Car Talk.