Facebook has lost $80 billion in market value since its data scandal
NEW YORK -- Facebook shares fell 5 percent Tuesday on reports that CEO Mark Zuckerberg agreed to testify in front of Congress about the company's data scandal. The crisis began on March 16 after Facebook said it was suspending data analysis company Cambridge Analytica for allegedly harvesting data from more than 50 million Facebook users. Cambridge Analytica worked on Donald Trump's presidential campaign.