We spend the hour with world-renowned linguist and dissident, Noam Chomsky. In a wide-ranging public conversation at the Harvard Memorial Church in Cambridge, Massachusetts, Chomsky talks about President Obama’s foreign and national security policies, the lessons of Vietnam and his own activism. “You just can’t become involved part-time in these things,” Chomsky says. “It’s either serious and you’re seriously involved, or you go to a demonstration and go home and forget about it and go back to work, and nothing happens. Things only happen by really dedicated, diligent work.”