Facebook founder Mark Zuckerberg tells Lesley Stahl that the Beacon ad model, which caused some controversy last year, needs work but will be "a really...
SXSWi 03/09/2008 - Keynote - Mark Zuckerberg, Founder/CEO of Facebook Inc.
SXSW Interactive - Austin, TX
Interviewed by Sarah Lacey - Author/Journalist of BusinessWeek/Yahoo!