The Internet was born on October 29, 1969, the day the world as we know it changed. The Internet is both ubiquitous and full of potentialand risks, says Julian Zelizer. Zelizer: The Internet has become, in the words of Kleinrock, who sent that first message with his student, a pervasive global nervous system. But at the core it is still the same Arpanet created 50 years ago, and this is a mixed blessing, but motivated trouble, cause and risks are outpacing advances.”]

