George Carlin mourned as counterculture hero

George Carlin, who died of heart failure Sunday at 71 

May 12, 1937 – June 22, 2008

 This is a March 19, 2004 file photo of actor and comedian George Carlin posing in a New York hotel .  A publicist for George Carlin says the legendary comedian has died of heart failure at a hospital in Santa Monica, Calif., Sunday June 22, 2008.    (AP Photo/Gregory Bull/file)