How to weaponize T cells to fight cancer with Legend Biotech CEO Ying Huang, PhD. (LEGN). Why EXACT Sciences (EXAS) has recruited hundreds of former Pfizer employees. Valero Energy (VLO) gets to work restarting refineries that were shutdown because of Hurricane Ida. Casper Sleep (CSPR) struggles as its CEO is busy launching other businesses. Robinhood (HOOD) tours colleges to recruit customers. The Drill Down with Cory Johnson offers a daily look at the business stories behind stocks on the move. Learn more about your ad choices. Visit megaphone.fm/adchoices