WASHINGTON — In the wake of a terrorist bomb plot disrupted by the CIA, the U.S. advised some international airports and air carriers Tuesday about security measures for passengers traveling to the U.S.
The guidance from the Transportation Security Administration was a reminder of methods the U.S. provided to these international airports and carriers in the past six to eight months to help protect against threats from liquid explosives and explosives hidden inside a person's body or clothes or in printer cartridges. All are methods officials said al-Qaida's spinoff group in Yemen has considered for plots against the U.S, according to an American official who spoke on condition of anonymity to discuss the details of the guidance.
The CIA recently foiled a bomb plot in Yemen in which officials say a suicide bomber was to have detonated an explosive on a U.S.-bound flight.
"The seizure of this device is a reminder that our adversaries continue to be interested in targeting the aviation sector," Homeland Security spokesman Matt Chandler said Tuesday afternoon. Chandler said the government issued the guidance reminder "to underscore the importance of these ongoing measures to air carriers and foreign government partners." He said there is currently no credible or specific information about a terror threat to the U.S.
Despite the discovery of a sophisticated new al-Qaida airline bomb plot, congressional and security officials suggested there was no immediate need to change airport security procedures, which already subject many shoeless passengers to pat-downs and body scans.
The CIA, with help from a well-placed informant and foreign intelligence services, conducted a covert operation in Yemen in recent weeks that disrupted a nascent suicide plot and recovered a new bomb, U.S. officials said.
They said the bomb represented an upgrade over the underwear bomb that failed to detonate aboard a jetliner over Detroit on Christmas Day 2009. The new bomb was also designed to be used in a passenger's underwear, but this time al-Qaida developed a more refined detonation system.
FBI experts are picking apart that non-metallic device to see if it could have slipped through security and taken down an airplane.
Some passengers, meanwhile, were taking the news of the new bomb in stride.
"The terrorists will always be looking to make a bomb," said Guillaume Viard, a 26-year-old physiotherapist from Nice, France, about to board a flight to Paris at New York's John F. Kennedy Airport.
Retirees Nan and Bill Gartner, also at Kennedy Airport, were on their way to a vacation in Italy
"We were nervous — for a minute," said Nan Gartner. "But then we thought, we aren't going anywhere near Yemen, so we're OK."
Added Bill Gartner, "We hope we're right."
U.S. officials sought to reassure the public that security measures at airports are strong. They said there are no immediate plans to subject airline passengers to new security screenings.
"I think people getting on a plane today should feel confident that their intelligence services are working, day in and day out," John Brennan, the top counterterrorism adviser to President Barack Obama, said on ABC's "Good Morning America."
Just last winter, al-Qaida's Yemen branch boasted that it had obtained a supply of chemicals used to make bombs. Chemicals can eliminate the need for electrical equipment to detonate explosives.
"Hence, no wearisome measures are taken anymore to attain the needed large amount of chemicals for explosives," the group wrote in its online magazine, "Inspire."
The CIA caught wind of the bomb plot last month, officials said, speaking on condition of anonymity to discuss intelligence matters.
The would-be bomber was supposed to buy a plane ticket to the United States and detonate the bomb inside the country, officials said.
Sen. Dianne Feinstein, D-Calif., who heads the Senate Intelligence Committee, told reporters Monday night that she had been briefed about an "undetectable" device that was going to be on a U.S.-bound airliner.
Before the bomber could choose his target or buy his ticket, however, the CIA moved in and seized the bomb.
The fate of the would-be bomber remains unclear. Rep. Peter King, R-N.Y., chairman of the House Homeland Security Committee, told CNN on Tuesday that White House officials told him, "He is no longer of concern," a point Brennan echoed on a round of appearances Tuesday on television news shows.
"We're confident that this device and any individual that might have been designed to use it are no longer a threat to the American people," Brennan said.
The plot was a reminder of the ambitions of al-Qaida in Yemen, the most active and dangerous branch of the terrorist group. While al-Qaida's core in Pakistan has been weakened over the past decade, instability in Yemen has allowed an offshoot group to thrive and set up training camps there. In some parts of the country, al-Qaida is even the de facto government.
Though analysis of the device is incomplete, U.S. security officials said they remained confident in the security systems that are in place.
"These layers include threat and vulnerability analysis, prescreening and screening of passengers, using the best available technology, random searches at airports, federal air marshal coverage and additional security measures both seen and unseen," Homeland Security spokesman Matthew Chandler said.
"The device did not appear to pose a threat to the public air service, but the plot itself indicates that these terrorists keep trying to devise more and more perverse and terrible ways to kill innocent people," Secretary of State Hillary Rodham Clinton said during a news conference in New Delhi with Indian External Affairs Minister S.M. Krishna.
It's not clear who built the bomb, but because of its sophistication and its similarity to the Christmas Day bomb, authorities suspect it was the work of master bomb maker Ibrahim Hassan al-Asiri or one of his students. Al-Asiri constructed the first underwear bomb and two others that al-Qaida built into printer cartridges and shipped to the U.S. on cargo planes in 2010.
Both of those bombs used a powerful industrial explosive. Both were nearly successful.
But the group has also suffered significant setbacks as the CIA and the U.S. military focus more on Yemen. On Sunday, Fahd al-Quso, a senior al-Qaida leader, was killed by a missile as he stepped out of his vehicle along with another operative in the southern Shabwa province of Yemen.
Al-Quso, 37, was on the FBI's most wanted list, with a $5 million reward for information leading to his capture. He was indicted in the U.S. for his role in the 2000 bombing of the USS Cole in the harbor of Aden, Yemen, in which 17 American sailors were killed and 39 injured.
Al-Quso was believed to have replaced Anwar al-Awlaki as the group's head of external operations. Al-Awlaki was killed in a U.S. airstrike last year.
The new Yemeni president, Abed Rabbo Mansour Hadi, has promised improved cooperation with the U.S. to combat the militants. On Saturday, he said the fight against al-Qaida was in its early stages. Hadi took over in February from longtime authoritarian leader Ali Abdullah Saleh.
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