CBS News National Correspondent Dan Raviv hosts the CBS News Weekend Roundup. This week, Correspondent Cami McCormick and KMOX Radio's Kevin Killeen report on the flooding along the Mississippi River. Correspondent Barry Bagnato wraps up the important Supreme Court decisions that came down this week. And Dan interviews the head of the I.R.S., Doug Shulman, on why deductions for using a vehicle for business are up sharply.
