Restrictions are no longer in effect for the last of 10 airports with US bound flights that had a ban on electronic devices.
The United States has ended the ban on large electronics in the cabins of airlines that it announced in March.
At an appearance at the Aspen Security Forum on Wednesday, Kelly said the TSA had developed and tested an two devices containing explosives hidden in large electronic devices.
The Department of Homeland Security officially lifted the ban on large carry-on electronics for US -bound flights. And to say the least, it destroyed the airplane.
The Department of Homeland Security announced yesterday on Twitter the official lifting of the ban. But the US believes terrorist groups - particularly al Qaeda in the Arabian Peninsula (AQAP) - remain determined to bring down a commercial aircraft.More news: Twitter Stock Price: 3 Takeaways From Quarterly Earnings Report
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The ban included 10 airports in North African and Middle Eastern countries.
SCHAPER: So the Department of Homeland Security now requires airports around the world that are the final points of departure for flights coming into the U.S.to enhance security screening protocols and upgrade bomb detection equipment.
Officials released a statement to CBS News saying communication between the DHS and Transportation Security Agency led to the increase in airline safety.
US authorities remained vague about what this enhanced security would look like but noted that it will include "heightened screening of personal electronic devices" and "increasing security protocols around aircraft and in passenger areas".
The regulations could include asking passengers to present larger electronic devices for inspection and prove that they can be powered on.