Homeland Security Secretary John Kelly announced new security measures that will affect all commercial flights entering the U.S. from abroad, during a speech before security experts Wednesday afternoon.

But he stopped short of imposing a global laptop ban, like the laptop ban he imposed on 10 airports in the Middle East and North Africa. Instead, Kelly said a range of new measures would be required for other airports, and said those failing to meet the new requirements could face a laptop ban and possibly a ban on flights, although he said he expected most airports to comply.