In a heated interview to be aired on Sunday on "Fox News Sunday," the former Democratic president defended the steps he took after al-Qaeda's attack on the USS Cole in 2000 and faulted "right-wingers" for their criticism of his efforts to capture Osama bin Laden.

"But at least I tried. That's the difference in me and some, including all of the right-wingers who are attacking me now," Clinton said when asked whether he had failed to fully anticipate bin Laden's danger. "They had eight months to try, they did not try. I tried. So I tried and failed."

The September 11 attacks occurred almost eight months after President George W Bush succeeded Clinton in January 2001.