When the US government shuts down, it means that non-essential federal government operations and services are halted due to a lack of approved funding. Around 40% of the federal workforce—approximately 800,000 employees—are furloughed without pay, while essential workers such as air traffic controllers, TSA personnel, military members, and law enforcement continue working but without immediate compensation. Federal employees do not receive paychecks during the shutdown, although they typically receive back pay once the government reopens. Critical government functions like Social Security, Medicare, Medicaid, and national security operations continue but may experience delays or reduced services. Travelers can expect security and air travel delays, including longer passport processing times. Many national parks and museums close, and federal contractors lose work without guaranteed back pay. Military personnel remain on duty but do not receive paychecks until funding is restored. Agencies like the FDA slow down routine inspections and safety activities, and some research programs are paused due to furloughs. The shutdown disrupts many federal programs and can cause significant economic impacts until resolved. Congress members and the president continue to receive their salaries during the shutdown.