Left-leaning bloggers have had a tremendous impact on the Democratic Party.

Facebook's headquarters is a two-story building at the end of a quiet, tree-lined street. Zuckerberg nicknamed it the Bunker. Facebook has grown so fast that this is the company's fifth home in six years - the third in Palo Alto. There is virtually no indication outside of the Bunker's tenant.

Culture is about humanizing people. You look at the African-American civil rights movement, you look at the LGBT rights movement - the culture changed before the politics did.

I'm more than willing to go to places and talk to people who believe that I am an illegal alien who deserves to be jailed. I want to look them in the eye and say, 'What makes you think I'm any different from you?' I think for our generation, immigration rights is a civil rights issue.