Wanted: Destroyer of space shuttles

No kidding. I know NASA used to arm unmanned rockets with self-destruct devices to blow errant rockets up before they hit populated areas, I didn't know they did it with manned shuttles as well.

Given how often they have false-positives on various danger tests and abortive attempts at take-off, reentry and honesty in budget proposing and airline-danger-report-censoring, you'd think this would make the astronauts nervous.