Watch excerpts from our recent interview with the author of “Shake Hands with the Devil: The Failure of Humanity in Rwanda” and “They Fight Like Soldiers, They Die Like Children: The Global Quest to Eradicate the Use of Child Soldiers.”

As debate grows over US involvement in NATO’s intervention in the Libyan civil war, watch an excerpt from our recent interview with the force commander of the UN Assistance Mission to Rwanda in 1993-1994 and the author of “Shake Hands with the Devil: The Failure of Humanity in Rwanda.”

A law professor and author asks what force should be used for in a just world and observes that deciding to intervene militarily to protect people who are being slaughtered by their own government is "an enormous break with America’s practice."

In a new book called "The Violence of Peace: America's Wars in the Age of Obama," Yale Law School professor Stephen Carter ponders the vocabulary of just and unjust war and the significance of using the American military for humanitarian intervention.

"Whether you act or whether you don't act, the stakes are really quite high, and that's what makes it so daunting from a moral perspective."

For 100 days in 1994, Rwandans killed each other at a rate of 10,000 a day. Today the country tries to heal its wounds and deal with the consequences of the slaughter. "We have a nation to build," says Anglican Bishop John Rucyahana. "We cannot wait until we forget the genocide."

One of the most influential evangelical leaders today is Rick Warren, pastor of Saddleback Church, a megachurch in southern California. Warren is perhaps best known for his mega-selling book, THE PURPOSE DRIVEN LIFE. Since its release in 2002, it has sold more than 25 million copies, making it one of the best-selling books in history. But what is less known is that Warren and his wife Kay have donated most of their earnings to help heal some of the world's worst ills.