The Department of Homeland Security on Wednesday called for new airline security measures, including increased screening, for flights into the US from around the world.
"They will include enhanced screening of electronic devices, more thorough passenger vetting, and new measures created to mitigate the potential threat of insider attacks", Kelly said.
While the DHS did not give specifics, they said with the new measures passengers could expect enhanced screening and security measures.
DHS said that if carriers refuse to follow the new security measures they could face financial penalties, be included in a laptop ban or be banned from operating direct flights to the United States.
"Security is my No. 1 concern", Kelly said during a speech at the Center for a New American Security.
"The idea is to raise the bar on global airline security", a senior DHS official said.
It is not clear when the enhanced measures would be put into place, but DHS officials said travelers may start to see changes as early as this summer. If they don't, their passengers may be barred from carrying laptops and other large electronics in passenger cabins.
The administration's announcement comes after weeks of negotiations between the US and Europe over whether to restrict large electronics on all USA -bound flights - a policy that now only applies to 10 overseas airports. The ban applies to nonstop flights to the United States from Amman, Jordan; Kuwait City, Kuwait; Cairo; Istanbul; Jeddah and Riyadh, Saudi Arabia; Casablanca, Morocco; Doha, Qatar; and Dubai and Abu Dhabi in the United Arab Emirates.
They will include additional K9 teams and a new screening technology. The updates affect 280 airports in 105 countries running about 2,000 flights daily - adding up to 325,000 passengers every day.
Starting in April, Kelly repeatedly said it was "likely" the laptop ban would expand to other airports-and even said in May the government could potentially expand the ban worldwide.
Some of the measures have already been tested at Phoenix Sky Harbor International Airport. TSA had expected to begin testing CT scanners for carry-on luggage by the end of 2016. Suspicious bags can be pulled aside and opened by screeners.
European Union officials characterized a meeting last month in Brussels with top U.S. Homeland Security officials as productive but also urged officials to consider other ways to address the potential threat.
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.