What Historically Black Colleges and Universities Can and Can't Provide

Chef Robert Lehmann is the former Executive Chef of MANNA, a meals-delivery service organization for homebound people with AIDS in Philadelphia. He developed diet and nutrition standards for people who are HIV positive. He has a new book: "Cooking for Life: A Guide to Nutrition and Food Safety for the HIV-positive Community" Lehmann is currently Projects Coordinator for HIV Nutrition Research at The Graduate Hospital in Philadelphia.

Filmmaker Ken Burns is the director of "The Civil War" and "Baseball," the hit documentaries on PBS. The former was the network's highest rated series. Burns' newest project is the three-hour documentary, "Thomas Jefferson" about our third president, narrated by Ossie Davis.