Leading CEOs appeal to President Bush to consider reducing greenhouse gases by placing mandatory regulations on dangerous pollutants such as carbon dioxide. Participants include the CEOs from ALCOA, PG&E, Lehman Borthers, GE and more.

There's Mitt Romney, Hillary Clinton, Bill Richardson and Barack Obama. The field of presidential candidates is getting crowded. We speak with Lee Bandy of The State newspaper in South Carolina, Guy McMillan of Keene Sentinel in New Hampshire, and Lynn Sweet of the Chicago Sun Times.

We look at how democratic reformers are faring in Saudi Arabia and Egypt. Toby Jones of Swarthmore College says reforms in these two countries have suffered since the war in Iraq.

And now there are two...

We speak to first-time author Kris Holloway about her book, "Monique and the Mango Rains: Two Years with a Midwife in Mali," which describes her time in Mali with the Peace Corps. Kris writes about Monique, an activist in Mali, who died in child birth.