Massachusetts Senator Ted Kennedy is undergoing surgery on his malignant brain tumor at Duke University Medical Center in North Carolina. We speak with Dr. Carl Heilman, chairman of Neurosurgery at Tufts Medical Center in Boston, who has performed the kind of surgery Kennedy is undergoing.

What are the presidential candidates saying about Social Security and Medicare? How would they make sure baby boomers will be able to retire? Journalist Roger Lowenstein joins us to talk about the plans proposed by John McCain, Hillary Clinton and Barack Obama. Lowenstein's new book is, "While America Aged: How Pension Debts Ruined General Motors, Stopped the NYC Subways, Bankrupted San Diego, and Loom as the Next Financial Crisis."

We get a report on the Democratic presidential campaign in Montana from Courtney Lowery, long-time political reporter and editor-in-chief of New West. And Ken Walsh, chief White House correspondent for U.S. News and World Report gives us an overview of the delegate and super-delegate math.

For the first time in 21 years, the Boston Celtics and Los Angeles Lakers will meet in the NBA finals on Thursday. The Lakers were victorious in the 1987 meeting and Boston hasn't made it to the finals since. Longtime Boston Globe sports columnist Bob Ryan tells us about the historic rivalry and gives his predictions for this year's match-up.

As moviegoers flock to the theaters to see "Sex and the City," Robin Young recalls meeting Sarah Jessica Parker.

We talk with Blake Hazard and John Dragonetti, a.k.a. The Submarines. The duo is out with their second album which is getting critical acclaim for its summery tunes.