The Dow Jones Industrial average fell as much as 546 points yesterday and ultimately closed down 416.02 points. According to the New York Times, yesterday’s slide marked the worst decline in terms of points since 9/11. The Dow’s 3.29 percent drop was the worst day for the market in percentage terms since March, 2003. What happened and what can we expect from this correction? We’ll talk with Forbes Associate Editor Michael Maiello in the first half of the hour and Marketplace contributor David Johnson in the second half.