The head of the Federal Aviation Administration speaks to Congress today in the wake of the Boeing 737 Max tragedies this past year. Before his testimony, Steve Dickson shares his strategy for flight safety and Boeing 737 recertification in an exclusive interview with CNBC. Pot stocks have lost billions in market value since March, but CEO of cannabis portfolio company Acreage says now is the best time to invest. Plus, Saudi Aramco’s IPO debut, Andrew’s Dave & Buster’s winnings, the Yankees’ new pitcher, and 850 Grateful Dead concerts.