Obama Claims Historic Victory

It's been a historic primary season. Barack Obama and John McCain have already begun focusing on each other in the race for the White House. What role will Hillary Clinton play? Would the so-called Obama-Clinton dream ticket be a winner or a nightmare? What do the Republicans gain from the ongoing divisions among Democrats? Also, United Airlines announces new cost-cutting measures, and Senate Republicans are working hard to defeat a proposed climate-change bill. No one's arguing anymore about the fact of global warming. The debate is about how to deal with it. Sara Terry guest hosts.