https://www.reuters.com/article/us-delta-airbus/delta-postpones-airbus-a220-launch-due-to-u-s-government-shutdown-idUSKCN1PJ271

Delta Air Lines said on Friday it had decided to postpone the debut of its Airbus A220 due to delays in the Federal Aviation Administration certification process, which has stalled during the partial U.S. government shutdown.