David Goldman / CNBC

It was an extraordinary sight: Warren Buffett and Bill Gates walking around the Columbia University campus in Manhattan with CNBC's Becky Quick. 

While outdoors, they held umbrellas to protect themselves from a light rain.

Buffett and Gates, two of the richest men in the world and close friends, attracted some attention from those passing by, but not as much as you might think.

Later that day, surrounded by our television cameras, they answered  questions from over 700 Columbia Business School students for a 90-minute CNBC Town Hall Event, Warren Buffett & Bill Gates: Keeping America Great.

During their pre-show walking tour, Buffett and Gates answered Becky's questions, with three handheld CNBC cameras capturing the conversation.

Among many other topics, they talked about Wall Street's appropriate role in the financial world, the Obama administration's health care reform drive, what the two members of an "odd couple" have in common, and Buffett's days as a student at Columbia in the early 1950s.  His rendition of the Columbia fight song We Own New York is a highlight.

We've already posted a snippet of that conversation in which Buffett warns against curbing the Federal Reserve's independence.

Now, for the first time in a CNBC.com exclusive, here is the complete Buffett-Gates 'Columbia Walk and Talk' with Becky from November 12, 2009.

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