With the release of their albums once again on vinyl, the Beatles' music will have turned full circle, returning via tapes, compact discs, minidiscs and mp3s to the format where it all began.

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Sanford, Florida (CNN) -- After a week of demonstrations nationwide, as well as calls for justice and an uproar over hoodies on Capitol Hill, the focus of the Trayvon Martin saga on Saturday will once again return to the Florida city where it all began.

CNN: STORY HIGHLIGHTS

At an Olympics hit by drugs scandals around the host nation's top sprinters and in the weightlifting arena, the failure is an embarrassing end to a Olympic high point when the "homecoming Games" returned for a day to the spot in rural Arcadia where it all began nearly 3, 000 years ago.

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Now, Iowa is our first stop this week on the road to our convention in Charlotte, North Carolina. (Applause.) And it was important for me to begin that journey right here in Iowa because this is where it all began for us four years ago -- right here in Iowa. (Applause.) Because it was you, Iowa, who kept us going when all the pundits had written us off.

WHITEHOUSE: Remarks by the President at Campaign Event

We began by going back to where it all started.

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Ownership led to the broader responsibility of making an impact in the community where it all began in the first place.

WHITEHOUSE: Actively Serving Neighborhoods in Need

And that's why we wanted to come here to Iowa tonight -- (applause) -- because truly this is where it all began, right here.

WHITEHOUSE: The White House