Iraq & Afganistan wars

Col. Lawrence Wilkerson was chief of staff for former Secretary of State Colin Powell; he became an outspoken critic of the Bush administration after leaving the State Department in January 2005.

Lawrence Wright is an author, screenwriter, playwright and a staff writer for The New Yorker magazine. He sits on the Council on Foreign Relations, and he won a Pulitzer Prize for his book The Looming Tower: Al-Qaeda and the Road to 9/11.

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.

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.

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.

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.

Joel Hafvenstein spent a year in Afghanistan trying to convince opium-poppy farmers to give up what he calls "the perfect crop." Working for a private company funded by the United States Agency for International Development, Hafvenstein helped provide Afghan farmers with alternative jobs — like building canals and roads — in hopes that they'd give up their alliance with the Taliban.

Washington Post correspondent Thomas Ricks has recently returned from Iraq — where senior military commanders now say that the key threat facing the U.S.effort isn't terrorists, it's the intransigence of the Shia-dominated government.

Ricks, a regular Fresh Air guest, is a Pulitzer Prize-winning journalist and author of the best-selling Fiasco: The American Military Adventure in Iraq.

Our guest, Father John Barkemeyer, left a parish on Chicago's South Side to become an Army chaplain in 2003, the year U.S. and coalition forces invaded Iraq. There's a shortage of Catholic priests in the Army, and for much of his current tour in Iraq, Barkemeyer has been the service's only Catholic chaplain in the province of Anbar.