Inside N.Y. City's September 11 Memorial

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The 10th anniversary of the September 11, 2001 attacks on New York City is just two weeks from Sunday. How the world has changed in the decade since.

In the video below, CBS takes us inside the memorial site at ground zero, where a a test on one of the reflecting pools was recently run. It's very cool.

Two pools, each in the footprint of a tower, are an acre in size and 50 feet deep, and will become the largest human-made waterfalls in the nation.

The memorial officially opens on September 11, 2011. Check it out: