(Editor’s note: This story has been updated to include a statement from Pentagon Press Secretary John Kirby and White House Coronavirus Response Coordinator Jeff Zients.) Major defense companies are bracing for workforce and supply chain disruptions related to the federal mandate requiring all government contractors be fully vaccinated against COVID-19 by Dec. 8. Many defense contractors are seeing employee protests and walkouts on account of the mandate and the chief executive of Raytheon Technologies, Greg Hayes, said Tuesday during...