The thin blue line was black and blue that day.

NPR: Who Wants To Be New Orleans Mayor, Anyway?

Inevitably the thin blue line appears very thin.

ECONOMIST: Jack Straw takes on the law

The Thin Blue Line.

FORBES: Do The Oscars Have A Best Documentary Problem?

On that fateful day that citizen militia leveled their spears and their thin blue line attacked a professional Persian force many times their number, slaughtering them to the last man on the legendary beach of Marathon.

FORBES: Occupy Wall Street, Frank Miller, And Why Athens Is Better Than Sparta