2021/07/17 07:07
FILE - In this Thursday, Feb. 18, 2021, file photo, a Delta Airlines pilot wears a face mask to help prevent the spread of the new coronavirus as he w...
FILE - In this Thursday, Feb. 18, 2021, file photo, a Delta Airlines pilot wears a face mask to help prevent the spread of the new coronavirus as he walks through a terminal at Hartsfield-Jackson International Airport in Atlanta. A key senator is asking six U.S. airlines, including Delta, to explain the high rates of delayed and canceled flights this summer, and she's asking whether there are labor shortages despite the airlines getting billions in federal aid to keep workers on the job. (AP Photo/Charlie Riedel, File)