Afterburners are only used on supersonic aircraft like fighter planes and the Concorde supersonic airliner.

The Concorde supersonic airplanes are no longer in active service; you can only see them in some museums.

It began in the backyards of Des Moines and the living rooms of Concord and the front porches of Charleston.

Concord brings forward small things, discord ruins the great ones.

I was never the likeliest candidate for this office. We didn't start with much money or many endorsements. Our campaign was not hatched in the halls of Washington. It began in the backyards of Des Moines, and the living rooms of Concord, and the front porches of Charleston. It was built by working men and women who dug into what little savings they had to give $5 and $10 and $20 to the cause.

The best, most beautiful, and most perfect way that we have of expressing a sweet concord of mind to each other is by music.

The various modes of worship which prevailed in the Roman world were all considered by the people as equally true; by the philosopher as equally false; and by the magistrate as equally useful. And thus toleration produced not only mutual indulgence, but even religious concord.

Great speed is a feature of the Concorde.

We studied the Concordance to Shakespeare to accumulate examples of alliteration.

Have you heard about the sinking of the Costa Concordia luxury cruise ship?