Something weird happened with the stock market this week: It dropped about 1,800 points in two days. That's not the weird part, though. What's strange is that a software company called Blackbird AI, which uses artificial intelligence to track disinformation, discovered a sinister effort to manipulate and distort information about the spread of coronavirus. Wasim Khaled, CEO of Blackbird AI, joins us to explain what they learned and why this is a serious national security risk.