As the government shutdown significantly affects air travel, passengers are experiencing extensive delays and cancellations, with over 2,000 flights canceled recently. President Trump has expressed frustration with air traffic controllers who are not reporting to work, threatening to dock their pay and even suggesting that those who fail to show up might be replaced. Union leaders warn that even if the government reopens soon, the impact on air traffic control will linger, leading to continued travel disruptions. The existing staffing shortages and the toll of unpaid work during the shutdown have raised concerns over safety and operational effectiveness in the U.S. air traffic control system.