A shutdown of the U.S. Department of Homeland Security that took effect early Saturday impacts the agency responsible for screening passengers and bags at airports across the country. Travelers with airline reservations may be nervously recalling a 43-day government shutdown that led to historic flight cancellations and long delays last year.

Major travel groups and airlines are pushing US lawmakers to reach a deal on government funding ahead of a partial shutdown, arguing it could lead to travel chaos during spring break.