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Drew Houston and Walt Mossberg at Columbia Entrepreneurship Day (at Diana Center, Barnard College)

Drew Houston and Walt Mossberg at Columbia Entrepreneurship Day (at Diana Center, Barnard College)

The partnership of @kpcb at annual meeting (at Rosewood Sand Hill)

The partnership of @kpcb at annual meeting (at Rosewood Sand Hill)

John Doerr and Dick Costolo @kpcb annual meeting @twitter (at Rosewood Sand Hill)

John Doerr and Dick Costolo @kpcb annual meeting @twitter (at Rosewood Sand Hill)

Book fair at the Harvard Club of NYC. Tech and the City featured. Come rescue me!

Book fair at the Harvard Club of NYC. Tech and the City featured. Come rescue me!

Columbia SEAS board meeting on the 150th anniversary of the school.  (at Low Memorial Library)

Columbia SEAS board meeting on the 150th anniversary of the school. (at Low Memorial Library)

Mary Boyce, Dean of School of Engineering at Columbia (at The Morgan Library & Museum)

Mary Boyce, Dean of School of Engineering at Columbia (at The Morgan Library & Museum)

at The Morgan Library & Museum

at The Morgan Library & Museum

Celebration of Columbia’s $6.1B capital campaign! Wow.

Celebration of Columbia’s $6.1B capital campaign! Wow.

TiE Angels (at Loeb & Loeb)

TiE Angels (at Loeb & Loeb)