What does $456 billion buy?

Interesting slide show about the projected cost of the Iraq "war" come September, and some ideas as to what we could afford with that much money.

Is it the correct usage of the word to say, "Isn't it ironic that, with just one-sixth of the money spent on the Iraq war (where oil earnings were supposed to fund the reconstruction), we convert all the cars in America to run on ethanol"?