Mark Zuckerburg

Mark Zuckerberg spoke before the showing of a documentary, "Documented." He has been a public advocate of immigration reform. (Monica Lam/KQED)

Mark Zuckerberg spoke before the showing of a documentary, “Documented.” He has been a public advocate of immigration reform. (Monica Lam/KQED)

Mark Zuckerberg spoke before the showing of a documentary, “Documented.” He has been a public advocate of immigration reform. (Monica Lam/KQED)