Obama within reach of nomination After primaries in Kentucky and Oregon, Democratic presidential candidate Barack Obama is claiming he's earned a majority of pledged delegates and has passed the necessary threshold to win his party's nomination. Midday takes a look at the results from these most recent primaries, as well as the latest news in the U.S. Senate race and the recent brain tumor diagnosis of Sen. Edward Kennedy, D-Mass.11:00 a.m.
Steven Smith: Director of the Weidenbaum Center on the Economy, Government, and Public Policy at Washington University in St. Louis.
'Survival in the Serengeti' Serengeti National Park in the East African nation of Tanzania is one of the most famous wildlife areas in the world. But for rural people living nearby, lions and elephants are a daily threat. A University of Minnesota professor is working to reduce conflict between humans and wildlife but his work is embattled.12:00 p.m.