Sumner Redstone, Executive Chairman of Viacom and CBS Corporation, holds a proclamation to his name before unveiling his star on the Walk of Fame in Hollywood, California in this March 30, 2012 file ... more 

Sumner Redstone, Executive Chairman of Viacom and CBS Corporation, holds a proclamation to his name before unveiling his star on the Walk of Fame in Hollywood, California in this March 30, 2012 file photo. REUTERS/Mario Anzuoni/Files less