Mark Zuckerberg apologises to Congress over massive Facebook breach

Facebook chief Mark Zuckerberg apologised to US lawmakers on Tuesday for the leak of personal data on tens of millions of users as he faced a day of reckoning before a Congress mulling regulation of the global social media giant. In his first-ever US congressional appearance, the Facebook founder and chief executive sought to quell the storm over privacy and security lapses at the social network that have angered lawmakers and Facebook's two billion users.