Deputy national security adviser John Brennan said Osama Bin Laden was looking to plan an attack against the United States on the 10th anniversary of Sept. 11, 2001.
"We know from the material recovered from the Bin Laden compound that Bin Laden was looking at the 10th anniversary of 9/11 as an opportunity to strike yet again at the U.S. homeland," said Brennan in an interview that will air on the "PBS Newshour" Wednesday night.
Obama's chief counterterrorism adviser told PBS he believes the country is "without a doubt" safer today than it was ten years ago.
He said it has become much more difficult for terrorists to operate within the United States.
Brennan praised better interaction of government agencies and progress overseas for making the country safer.
Brennan said he doesn't believe another attack is "inevitable."
"I like to think that every day we're going to try to uncover any type of terrorist activity that's out there and take the steps to thwart any type of planning that might result in an attempted attack," said Brennan.