CIA Director Leon E. Panetta on Monday supported the agency's interrogation methods on accused terrorists following the Sept. 11 attacks, as more documents on the issue are being made public.

"This much is clear: The CIA obtained intelligence from high-value detainees when inside information on al Qaeda was in short supply," Mr. Panetta said in a memo to employees. "The use of enhanced interrogation techniques, begun when our country was responding to the horrors of September 11th, ended in January."

The memo is the second in four months in which Mr. Penetta has tried to reassure the agency's estimated 20,000 employees amid controversy about water-boarding and other advanced interrogation techniques...