Coming Up on This Week with George Stephanopoulos

— -- This Sunday, Sen. John McCain, R-Ariz., joins George in the studio for an exclusive interview. Hear what McCain has to say about his fight for the Republican nomination and the topics he's asked about out on the campaign trail including immigration, Iran and Iraq.

Then, Sen. Dianne Feinstein, D-Calif., and Rep. Duncan Hunter, R-Calif., discuss the wildfires that ravaged California this week and forced the largest evacuation of U.S. citizens since Hurricane Katrina. Find out what the California lawmakers think of the federal response to the disaster.

On our "Roundtable," Paul Krugman, Chrystia Freeland and George Will debate the week's politics.

And our "Voice," filmmaker Molly Bingham. The photojournalist and former White House photographer talks about her new film, "Meeting Resistance." The film focuses on the Iraqi insurgency and what motivates Iraqis to join its ranks. The film features conversations with active insurgents and has been used by the U.S. Army to help soldiers better understand their opposition.