Mark Zuckerberg (right) poses for a photo with Priscilla Chan (left) during a small wedding ceremony in Palo Alto, Calif. This photo was posted to Mark Zuckerberg's Facebook page on May 19, 2012.
Facebook chief Mark Zuckerberg said the toughest part of his job is figuring out how to adapt the social network to mobile devices.
Zuckerberg said that smartphones and tablet computers are both different user experiences than desktops in an interview from the Allen & Co. media conference in Sun Valley, Idaho, according to Bloomberg Businessweek. Zuckerberg also downplayed Facebook disastrous initial public offering.