The United States might ban laptops from aircraft cabins on all flights into and out of the country as part of a ramped-up effort to protect against potential security threats, U.S. Homeland Security Secretary John Kelly said on Sunday. In March, the government imposed restrictions on large electronic devices in aircraft cabins on flights from 10 airports, including the United Arab Emirates, Qatar and Turkey. Kelly said the move would be part of a broader airline security effort to combat what he called “a real sophisticated threat”. He said no decision had been made as to the timing of any ban.