Facebook CEO Mark Zuckerberg has been grilled by Congress over data misuse. He gave his testimony to Senate committees in light of revelations that Cambridge Analytica (CA) used Facebook data to influence US voters. Facebook co-founder Mark Zuckerberg has addressed Congress on Tuesday. He has admitted his mistake saying that he made a big mistake by not taking seriously the social network’s responsibility to its two billion users. Earlier, Zuckerberg released his prepared written remarks, ahead of two appearances before Congress. Watch the video for more insight.