Sunday on 'This Week' – Tragedy at the Elementary School

NEW YORK, Dec. 15, 2012— -- Sunday on a special edition of "This Week," George Stephanopoulos covers the latest developments in the devastating mass shooting at an elementary school in Newtown, Connecticut.

Details continue to emerge after a lone gunman opened fire Friday morning at an elementary school in Newtown, CT, killing 20 children and 6 adults. On Sunday morning, "This Week" brings the latest reporting and analysis from the ABC News team covering the investigation and aftermath in Newtown, including live reports from the scene of the deadly shooting.

Top Connecticut political officials, including Gov. Dan Malloy, Sen. Richard Blumenthal, Sen.-Elect Chris Murphy, and Hartford Mayor Pedro Segarra join George Stephanopoulos to discuss the latest on the shooting investigation, and how the Connecticut and Newtown community are coping with the tragedy.

Then, the "This Week" powerhouse roundtable examines the violence in Newtown, with Rep. Donna Edwards, D-Md., Rep. Jason Chaffetz, R-Utah, TIME Magazine political columnist Joe Klein, ABC News' George Will, and Democratic strategist and ABC News contributor Donna Brazile.

Following this latest deadly shooting, a grieving nation asks why this violence continues to happen in the U.S. Can any measures be taken to prevent mass shootings in the future? How should political leaders respond to the senseless violence? George Stephanopoulos and the powerhouse roundtable debate those questions Sunday.

Plus, ABC News Chief Health and Medical Editor Dr. Richard Besser join George Stephanopoulos to discuss how families in Newtown – especially the parents and children directly impacted – will grapple with this unprecedented violence in their community.

Tune in Sunday morning for this special edition of "This Week." Check the "This Week" page for guest listing updates.