File – In this April 30, 2014 file photo, Facebook CEO Mark Zuckerberg gestures while delivering the keynote address at the f8 Facebook Developer Conference in San Francisco. Zuckerberg and his wife, Priscilla Chan, are donating $120 million over the next five years to the San Francisco Bay Areas public school system. The gift is the biggest allocation to date of the more than $1 billion in Facebook stock the couple pledged last year to the nonprofit Silicon Valley Community Foundation. (AP Photo/Ben Margot, file)
