NEW YORK (CBSNewYork) — The first-ever stair climb benefit event at One World Trade Center will be held this Sunday, May 17.

The event was organized by the two foundations formed after the Sept. 11 terror attacks.

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Frank Siller, chairman and CEO of one of those foundations, the Stephen Siller Tunnel To Towers Foundation, stopped by the CBS 2 studios on Saturday.

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Click the video player for the full preview of the Tower Climb.

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For more information on the tower climb, click here.