President Barack Obama had been monitoring the operation since last month, the White House said Monday evening. White House spokeswoman Caitlin Hayden said the president was assured the device posed no threat to the public.
"The president thanks all intelligence and counterterrorism professionals involved for their outstanding work and for serving with the extraordinary skill and commitment that their enormous responsibilities demand," Hayden said.
Secretary of State Hillary Rodham Clinton said: "The device did not appear to pose a threat to the public air service, but the plot itself indicates that these terrorist keep trying to devise more and more perverse and terrible ways to kill innocent people. And it a reminder of how we have to keep vigilant." Clinton spoke during a news conference Tuesday in New Delhi with Indian External Affairs Minister S.M. Krishna.
The operation unfolded even as the White House and Homeland Security Department assured the public that they knew of no al-Qaida plots against the U.S. around the anniversary of bin Laden's death.
On May 1, the Homeland Security Department said, "We have no indication of any specific, credible threats or plots against the U.S. tied to the one-year anniversary of bin Laden's death."
The AP learned about the thwarted plot last week but agreed to White House and CIA requests not to publish a story immediately because the sensitive intelligence operation was still under way. Once officials said those concerns were allayed, the AP decided to disclose the plot Monday despite requests from the Obama administration to wait for an official announcement Tuesday.