Caption: “Our Joy, Our Liberation” was the theme of this year’s MLK Celebration, the 47th such annual event held by MIT. Clockwise from top left: Ijeoma Oluo, President L. Rafael Reif, Lana Scott, Oby Nwodoh, Corban Swain, and Mimi Wahid. Terms of Use: Images for download on the MIT News office website are made available to non-commercial entities, press and the general public under a Creative Commons Attribution Non-Commercial No Derivatives license. You may not alter the images provided, other than to crop them to size. A credit line must be used when reproducing images; if one is not provided