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Ahead on the 4/30 Maddow show

Tonight's guests include:Carol Rosenberg, reporter for the Miami Herald, has covered Guantanamo since 2002Paul Rieckhoff, founder and executive director of Iraq

Tonight's guests include:

Carol Rosenberg, reporter for the Miami Herald, has covered Guantanamo since 2002

Paul Rieckhoff, founder and executive director of Iraq and Afghanistan Veterans of America (IAVA) and Iraq war veteran

Happy birthday, Willie Nelson!

And here's executive producer Bill Wolff with a preview of what's to come: