Daily Business BriefingAug. 25, 2021Updated Aug. 25, 2021, 12:43 p.m. ETAug. 25, 2021, 12:43 p.m. ET Credit…Stefani Reynolds for The New York TimesDelta Air Lines is intensifying pressure on employees to get vaccinated with a series of increasingly burdensome requirements over the coming weeks and months, though it stopped short of the mandates that other airlines and businesses have put in place.In a letter to employees on Wednesday, the carrier’s chief executive, Ed Bastian, said that those who have not been vaccinated will immediately be required to wear masks indoors. Starting on Sept. 12, they will also have to take weekly coronavirus tests. …
