David Muir to Become the Anchor of World News Tonight

David Muir to become the new anchor of World News Tonight. Diane Sawyer takes us through over a decade of Muir's dedicated reporting from all over the world.
1:15 | 08/28/14

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Transcript for David Muir to Become the Anchor of World News Tonight
-- Reporting from. Missouri or Oklahoma home after home obliterated she did -- to the bathroom where she was huddled in the brain decider past. Katrina. Saddam Japan everyone is okay -- China. -- you can hear the gunfire just around the. All the stories from every corner of the plan. Melissa Bell -- that this is not a citizen and protect county -- -- Michigan. -- the lines he leads the charge. -- -- -- -- He's been right there are first reporters and ABC's David Muir did in New York near the front lines ABC's David Muir. Leads our coverage once again tonight about a. To each other's defense in our world that matter most. -- welcome home. Tradition.

This transcript has been automatically generated and may not be 100% accurate.

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