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03:32 — Watch American Idol winner Kris Allen's performance of God Bless the USA on the National Memorial Day Concert.
02:40 — Watch this special shout-out to our country's 43,000 service members who have been wounded in Iraq and Afghanistan.
03:24 — Watch General Colin Powell welcome home our heroes from Iraq and Afghanistan and thank them for their service on the National Memorial Day Concert.
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TVGuide.com editors break down theories about what's coming up on The Walking Dead