Terry Gross

Lt. Col. John Nagl commands the 1st Battalion, 34th Armor at Fort Riley, Kan. He served in Operation Desert Storm and was the operations officer of a tank battalion task force in Operation Iraqi Freedom. He helped author the Army's Counterinsurgency Field Manual.

Ali Allawi served as minister of trade and minister of defense under the Interim Iraqi Governing Council from 2003 to '04, then was minister of finance in the Iraqi Transitional Government between 2005 and '06.

Gen. Sir Michael Rose was best known as the commander of the U.N. Protection Force in Bosnia in the 1990s. In 2006, he called for the impeachment of then-Prime Minister Tony Blair for leading England into war in Iraq under false pretenses.

A former U.S. ambassador to Croatia and a senior diplomatic fellow at the Center for Arms Control and Non-Proliferation, Peter Galbraith is author of The End of Iraq: How American Incompetence Created A War Without End.

Hamburg-born Astrid Kirchherr met the Beatles in 1960, before they were famous. She took some of the earliest photographs of the group and was engaged to Stuart Sutcliffe, the Beatles' original bassist, before he died of a brain hemorrhage in 1962.

David Kirkpatrick is a correspondent in the Washington bureau for The New York Times. He covered the politics of the conservative Christian movement in the 2004 election, and has been following the presidential campaign of former Arkansas Governor Mike Huckabee.

Actor Peter Fonda is probably best known for his role in the cult-classic road movie Easy Rider. His new picture, 3:10 to Yuma, is a Western — a remake of the 1957 film. Fonda, son of actor Henry Fonda, is author of the memoir Don't Tell Dad.

Diagnosed with cancer for the third time, Susan Sontag signed on for a harsh treatment regimen in hopes it would keep her alive. But it only added to her suffering. Her son, journalist David Rieff, has published a memoir about his mother's "revolt against death."

Two million patients get bacterial infections from health-care workers each year. Nearly 100,000 of them die as a result. Dr. Richard Shannon argues that those infections — and deaths — are preventable.

Historian Drew Gilpin Faust writes that Civil War deaths — both their number and their manner — transformed America. Her new book is This Republic of Suffering: Death and the American Civil War.