Terry Gross

Iraqi-born professor Kanan Makiya teaches Islamic and Middle Eastern studies at Brandeis University, outside Boston. He is one of the leading Arab intellectuals who called for the removal of Saddam Hussein; he also advised the Bush administration before the invasion of Iraq.

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.

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.