All interesting heroes have an Achilles' heel.

Anybody who has political ambition has an Achilles heel.

The Achilles Heel of the Americas was the lack of cultural confidence typical of new settlers.

That's been the Achilles heel of our team the whole year.

Most liberals think of civil liberties as their Achilles heel. It isn't.

They are the terrorists' trump card -- and our Achilles' heel.