New security measures, such as stricter passenger screening take effect today, October 26, on all U.S.-bound flights in order to comply with the requirements of the government designed to avoid in-cabin ban on laptops.

The new measures could mean short security interviews with travelers at check-in or the boarding gate, raising concerns over extended processing time and flight delays.

These will affect a total of 325,000 airline passengers on around 2,000 commercial flights arriving per day in the U.S., on 180 airlines out of 280 airports in 105 countries.

The new rules were announced in June to end restrictions on carry-on electronic devices on airplanes coming from ten airports in 8 countries in North Africa and the Middle East in response to unspecified security threats.

Despite the fact that the restrictions were lifted in July, Trump administration announced it could reimpose measures on case by case basis if airports and airlines did not boost security.

United States and European officials said at the time airlines had 120 days to comply with the new measures, including increased passenger screening. The deadline is today. Until late July airlines had to expand explosive trace detection testing.