US President Barack Obama looks at Facebook CEO Mark Zuckerberg during a town hall meeting April 20, 2011 at Facebook headquarters in Palo Alto, California. AFP PHOTO/Mandel NGAN (Photo credit should read MANDEL NGAN/AFP/Getty Images)
US President Barack Obama looks at Facebook CEO Mark Zuckerberg during a town hall meeting April 20, 2011 at Facebook headquarters in Palo Alto, California. AFP PHOTO/Mandel NGAN (Photo credit should read MANDEL NGAN/AFP/Getty Images)