The word came to be associated both with a loud sound and with danger! When someone speaks of a "jovial mood" or a "herculean effort," he or she is using words with origins in mythology.

Plants that were in no immediate danger gave out less than one ultrasonic sound per hour.

Firepower of up to $1 trillion may sound a lot, but much more than that amount is in danger of souring in America as consumer credit deteriorates and more companies default.