Tanks line up to board landing ships at the French Naval Base in Tunisia, July 1943. Department of Defense hide caption

Emergency personnel work on Jan 8 at the scene where Rep. Gabrielle Giffords, (D-AZ) and others were shot outside a Safeway grocery store in Tucson, Ariz. Nearly anyone at the scene that day will be at risk for post traumatic stress disorder, but it's difficult to predict who will be affected. Matt York/AP hide caption

Google's poetry translation software can wrestle with the complicated meter of Shakespeare. istockphoto.com hide caption

The United States' largest slave uprising began in 1811, on a plantation 41 miles from New Orleans. AP/New York Public Library hide caption

The Decemberists' Colin Meloy (second from right) says he followed his "creative whim" to create The King Is Dead's simple, pretty songs. Autumn de Wilde/Courtesy of EMI Music hide caption