Five years ago: Imprisoned Chinese dissident Liu Xiaobo (lee-OO' show-BOH') won the 2010 Nobel Peace Prize, prompting a furious response from China. British aid worker Linda Norgrove, who'd been taken captive in Afghanistan, was killed during a U.S. special forces rescue attempt, apparently by a U.S. grenade. Gen. James Jones announced he was quitting as President Barack Obama's national security adviser. Albertina Walker, the Grammy-winning singer from Chicago known as the "Queen of Gospel," died at age 81.