President Obama delivers the commencement address May 14, 2012, to graduates at all-female Barnard College on the campus of Columbia University in New York. Barnard was the first college in New York City where women could receive the same liberal arts education available to men. (Associated Press)
President Obama delivers the commencement address May 14, 2012, to graduates at all-female Barnard College on the campus of Columbia University in New York. Barnard was the first college in New York City where women could receive the same liberal arts education available to men. (Associated Press)
Columbia University janitor Gac Filipaj, an ethnic Albanian who left his native Montenegro 20 years ago to escape war, give a thumbs-up during the School of General Studies graduation ceremony in New York on Sunday. (Associated Press)
Columbia University janitor Gac Filipaj, an ethnic Albanian who left his native Montenegro 20 years ago to escape war, give a thumbs-up during the School of General Studies graduation ceremony in New York on Sunday. (Associated Press)
In a photo provided by Goldberg McDuffie Communication, Dickson Despommier, a professor of public health in environmental health sciences at Columbia University is seen in an undated photo. Despommier's book titled "The Vertical Farm" was published in Oct. 2010, and explores the possibility of farming in skyscrapers as a way to solve food and fresh water shortages. (AP Photo/Goldberg McDuffie Communication, Marlene Bloom, HO)
Jeffrey Sachs, special adviser to U.N. Secretary-General Ban Ki-moon (The Earth Institute Columbia University)
