Infographic: Timeline of Facebook data scandal

Facebook is in hot water following news that private data of 50 million users of the social network were mined by

British consultancy firm Cambridge Analytica without their knowledge and used in targeted political campaigns, including President Donald Trump’s 2016 election campaign.

Facebook CEO Mark Zuckerberg, who has apologized time and again over the privacy breach, reportedly plans to testify before US Congress.

Meanwhile, across the Atlantic, the founder of the world's biggest social network platform is under fire from a UK parliamentary committee probing fake news for declining an invitation to testify before MPs for the third time.

Here is a timeline of how the data scandal unraveled to this day:

(CGTN)