The decision not to impose new restrictions on laptops is a boost to USA airlines, which have anxious that an expansion of the ban to Europe or other locations could cause significant logistical problems and deter some travel.
The officials said restrictions on the first ten airports will be lifted once airlines in those countries satisfy the new security protocols, officials said.
European and USA officials told Reuters that airlines have 21 days to put in place increased explosive screening and have 120 days to comply with other security measures, including enhanced screening of airline passengers.
Homeland Security Secretary John Kelly said last week that USA authorities want to take the 10 airports off the restrictions list "by simply doing the kind of things that we're talking about here in terms of raising aviation security".
In his speech, Secretary Kelly reaffirmed his belief that terrorist organizations are continuing their efforts to bring down an American airliner.
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The changes include the increased enhanced overall passenger screening, heightened screening of personal electronic devices, more thorough screening at checkpoints, along with the increased use of security technology, canines, and preclearance locations. The measures are a directive for airlines to follow because although DHS does not have jurisdiction over foreign airports, it does have authority over air carriers with direct flights to the US.
Kelly said he believes most airlines will adhere to the measures. They are likely to be imposed by this summer, the official said. Some of them, including the European Commission, had pushed back against US threats to extend the ban. DHS says countries now under the laptop ban can get off the list if the new measures are implemented all at their airports.
Kelly met with senior airline executives in May and Homeland Security officials have had repeated meetings with USA airline executives.
European officials, who have been engaged in high-level talks for weeks over the issue, urged the U.S.to consider alternative options to the ban. While CT scanning is already used for screening checked luggage, the size and cost of the machines had prevented them from being used for carry-ons.
The ban on laptops in the cabin is based on the belief that a bomb in the cargo hold would need to be bigger than one in the cabin, and capable of remote detonation.