Sunday on 'This Week' – Tragedy in Colorado: Movie Theater Massacre

'This Week' covers the latest on the mass shooting spree in Aurora, CO.

NEW YORK, July 20, 2012— -- Sunday on a special edition of "This Week," George Stephanopoulos covers the latest developments in the devastating mass shooting spree in Aurora, Colorado.

Details continue to emerge after a lone gunman opened fire early Friday morning in a crowded movie theater's midnight showing of "The Dark Knight Rises," killing 12 people, and injuring dozens more.

On Sunday morning, "This Week" brings the latest reporting and analysis from the ABC News team covering the investigation and aftermath of the shooting, including live reports from the scene of the deadly massacre.

Colorado Gov. John Hickenlooper and Aurora Mayor Steve Hogan join George Stephanopoulos to discuss the latest information on the shooting, and how Colorado and the Aurora community are coping with the tragedy. Philadelphia Police Commissioner Charles H. Ramsey will also join "This Week" to discuss the tragedy in Aurora from a law enforcement perspective.

Then, the "This Week" powerhouse roundtable examines the violence in Aurora, with former Democratic Pennsylvania Gov. Ed Rendell, author of the new book "A Nation of Wusses," ABC News' George Will, ABC News' Cokie Roberts, TIME Magazine political columnist Joe Klein, and The Washington Post's Jennifer Rubin.

Why do mass shootings continue to happen in the U.S.? Can any specific measures be taken to prevent mass shootings in the future, or are such acts unpreventable? And as the country reacts to the latest tragedy, will election-year politics thwart any serious debate in Washington over gun violence?

George Stephanopoulos and the powerhouse roundtable debate those questions Sunday, in a special edition of "This Week."

Check the "This Week" page for guest listing updates.

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