FILE - This July 11, 2017, file photo, shows a Delta Air Lines jet and a United Airlines plane at San Francisco International Airport in San Francisco. The Trump administration said Friday, June 5, 2020, it will let Chinese airlines operate a limited number of flights to the U.S., backing down from a threat to ban the flights. The decision came one day after China appeared to open the door to U.S. carriers United Airlines and Delta Air Lines resuming one flight per week each into the country. (AP Photo/Marcio Jose Sanchez, File)