Y2Y Homeless Shelter Co-founders and Co-directors, Sam Greenberg ’14 (right) and Sarah Rosenkrantz ’14 introduce U.S. Senator Elizabeth Warren (not pictured) during the opening of the Nationís First Student-Run Homeless Shelter for Young Adults run by Phillips Brooks House Association inside the First Parish in Cambridge, Unitarian Universalist. Kris Snibbe/Harvard Staff Photographer