Cargo air shipping companies warned the White House that its proposed vaccine mandate will wreak havoc on the supply chain by putting even more strain on staffing across the industry, according to a letter sent by a cargo association to the Biden administration. “We have significant concerns with the employer mandates announced on Sept. 9, 2021, and the ability of industry members to implement the required employee vaccinations by Dec. 8, 2021,” Stephen Alterman, the head of the Cargo Airline Association, wrote to the Office of Management and Budget, which is currently reviewing an emergency temporary standard that was submitted...