Ever heard of the term "squawk box"? If you work on Wall Street, you know what I'm talking about. It's an intercom system traders and brokers use to yell back and forth. Now just imagine if you could eavesdrop on those communications. Think you might pick up a stock tip or two? The Justice Department's been thinking along these lines, also. Marketplace's Amy Scott has the story.

The U.S. trade deficit has reached the second-highest level on record. The gap between what we import and what we sell abroad hit $58.3 billion in January. Today's news triggered another dip in the dollar. Does any of this really matter? Fair question. Alan Greenspan doesn't think so. "Not overly worrisome".That's what he said yesterday.But they're not so sure in London, where most of the world's currency trading is done.Some wonder if the U.S. has handed a powerful weapon to its adversaries. Marketplace's Stephen Beard explains.