Intel officer: CIA officers' deaths will be avenged

An American intelligence official vowed Thursday that the United States would avenge a suspected terrorist attack on a U.S. base in Afghanistan that resulted in the deaths of seven CIA officers.  "This attack will be avenged through successful, aggressive counterterrorism operations," the intelligence official vowed.

Former CIA official Robert Richer called it "the greatest loss of life for the Central Intelligence Agency since the Beirut Embassy bombing" in 1983, which killed eight agents.  Flags at CIA headquarters in Langley, Virginia, flew at half-staff Thursday.

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