What is air defense?

Famous quotes containing the words air and/or defense:

    “Old among the young, poor among the rich, I adopt an air of indefinable superiority.”
    —Mason Cooley (b. 1927)

    “For there is no defense for a man who, in the excess of his wealth, has kicked the great altar of Justice out of sight.”
    —Aeschylus (525–456 B.C.)