More info More info More info More info More info More info History.com More info History.com More info History.com More info More info More info History.com More info History.com More info More info History.com Alcatraz closes its doors Alcatraz closes its doors More info More info History.com More info More info anniversary of Alcatraz's closing More info History.com Alcatraz closes its doors - Mar 21, 1963 - HISTORY.com More info More info