At least 50 are dead after a suicide bomber struck the funeral of two Sunni brothers who had joined the U.S.- backed Awakening Council movement to fight Al Qaeda. More than 100 Iraqis have been killed in a series of bombings around the country this week, raising fears that insurgent groups are reorganizing in Iraq. Guest: Ned Parker, Baghdad correspondent for The Los Angeles Times.

What is the fallout from last night's bruising Democratic presidential debate in Philadelphia last night?

As the Pope visits the United States, we speak with Boston College history professor, James O'Toole. His new book is "The Faithful: A History of Catholics in America."

Only A Game's Bill Littlefield considers the start of the National Basketball Association playoffs, the early stages of the Major League Soccer season and what U.S. Olympic athletes may or may not say about host nation.

Is the fashion industry conflating mental illness and style? We speak to Kara Jesella, contributing editor to The New York Times Style Magazine.