President Donald Trump threatened to dock the pay of air traffic controllers who called in sick during the government shutdown, following widespread flight cancellations. This occurred as the record-breaking shutdown intensified strain on the aviation industry, though a potential compromise bill in Congress offered hope for an imminent resolution.

• An additional 2,300 US flights were cancelled on Monday, with over 8,700 flights delayed.
• The National Air Traffic Controllers Association (NATCA) union hailed its members as "unsung heroes" for working without pay.
• Trump publicly demanded that all air traffic controllers return to work "NOW!!!" on his Truth Social platform and recommended a $10,000 bonus for those who did not take time off.
• The air traffic control system was already under strain due to understaffing even before the current shutdown, which hit day 41.