'Red Ink': Understanding Why the U.S. Has So Much Debt

With a federal budget of $3.6 trillion, a deficit of $1 trillion and a total debt of $16 trillion, it can be difficult to fully comprehend where all this money comes from and what the U.S. government spends it on. Paul Solman talks to The Wall Street Journal's David Wessel about his new book "Red Ink," a primer to the budget.