Brennan: Bomb plot prompts caution WASHINGTON, May 8 (UPI) -- Deputy national security adviser John Brennan Tuesday said air travelers can be assured U.S. intelligence is working "day in and day out" to stop bomb plots. Brennan, a White House expert on counter-terrorism, said measures were being taken to prevent any type of improvised explosive device from thwarting airport security procedures. "I think people getting on a plane today should feel confident that their intelligence services are working day in and day out, to stop these IEDs from getting near a plane," he said during an interview on ABC's "Good Morning America." Also, I think when they go through security measures at airports, they understand why they're in place because there are terrorist groups, like al-Qaida, that continue to try to evade those security measures. In India, U.S. Secretary of State Hillary Clinton said the latest thwarted bomb plot shows terrorists still try to develop ways to "kill innocent people." "We're confident that neither the device nor the intended user of this device posed a threat to us," Brennan said. "Clearly our intelligence allowed us to have visibility into the existence of this device early on," Brennan said on CBS's "This Morning." We were able to take the appropriate steps necessary to prevent its possible use against innocent Americans and others.