Legendary African musician Oliver Mtukudzi, who died Wednesday of complications from diabetes, has been declared a national hero in his native Zimbabwe. He also was an activist, whose songs – on 67 albums – addressed everything from political oppression to economic disparity to HIV/AIDS. "Today we said goodbye to a true patriot. Oliver Mtukudzi, your voice has given us comfort during difficult times, and will remain with us for posterity. Rest in peace comrade," tweeted Zimbabwe's President Emme