Human bomb was double agent used by CIA

ABC News:

The suicide bomber who killed at least six Central Intelligence Agency officers in a base along the Afghan-Pakistan border on Wednesday was a regular CIA informant who had visited the same base multiple times in the past, according to someone close to the base's security director.

The informant was a Pakistani and a member of the Wazir tribe from the Pakistani tribal area North Waziristan, according to the same source. The base security director, an Afghan named Arghawan, would pick up the informant at the Ghulam Khan border crossing and drive him about two hours into Forward Operating Base Chapman, from where the CIA operates.

Because he was with Arghawan, the informant was not searched, the source says. Arghawan also died in the attack.

The story seems to corroborate a claim by the Taliban on the Pakistani side of the border that they had turned a CIA asset into a double agent and sent him to kill the officers in the base, located in the eastern Afghan province of Khost.

The infiltration into the heart of the CIA's operation in eastern Afghanistan deals a strong blow to the agency's ability to fight Taliban and al Qaeda, former intelligence officials say, and will make the agency reconsider how it recruits Pakistani and Afghan informants.

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I think the message it sends is that everyone needs to be screened before they are allowed onto a base. If this story is true, it means the earlier stories about the human bomb wearing an Afghan uniform were wrong, unless they were confusing the bomb carrier with Arghawan, the Afghan who brought him in.