CIA director Michael Hayden came under stiff challenge Friday for portraying Al-Qaeda as on the defensive after global setbacks, even in its safe havens along the Afghan-Pakistani border.Senate Intelligence Committee chairman, Jay Rockefeller, said Hayden's upbeat appraisal was not consistent with intelligence assessments provided his committee over the past year."In fact, I have seen nothing, including classified intelligence reporting, that would lead me to this conclusion," Rockefeller said in a scathing letter to the Central Intelligence Agency director.Hayden's assessment -- one of the most positive since the September 11, 2001 attacks -- comes less than a year after US intelligence warnings that Al-Qaeda had regrouped in the border area and was plotting attacks against the west.