The new regulations are not related to President Donald Trump’s executive order halting travel to the U.S. from six majority-Muslim countries, but are likely to apply to airports in those countries. Cellular phones and medical devices were exempt from the ban but laptops, tablets, cameras, DVD players, and gaming devices may only be transported via checked luggage. The ban will also revive strict rules about liquids on planes that date back to post-9/11 flying regulations. The motivation for restrictions suggested it is a prevention because that Al Qaeda and other groups are still looking for ways to sneak explosive materials onboard planes. No American carriers are impacted by the ban, which involves any device larger than a mobile phone. Brian Jenkins, an aviation-security expert at the Rand Corp., said the nature of the security measure suggested that it was driven by intelligence of a possible attack.