Photo: Thompson at Symantec Vision Summary: The security company's CEO John Thompson talks strategy to customers at annual get-together. By Bill Detwiler | July 19, 2006 -- 11:46 GMT (04:46 PDT) Follow @billdetwiler John Thompson Symantec CEO John Thompson delivers the opening keynote at the company's Vision event for customers in San Francisco on Monday. Topics: Symantec, Security Kick off your day with ZDNet's daily email newsletter. It's the freshest tech news and opinion, served hot. Get it.