"It's time we end the era of mass incarceration," Hillary Rodham Clinton said in a speech at Columbia University in New York, which was the first major address of her White House run. (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)