Anthrax attacks

A Newsnight investigation raised the possibility that there was a secret CIA project to investigate methods of sending anthrax through the mail which went madly out of control.

The shocking assertion is that a key member of the covert operation may have removed, refined and eventually posted weapons-grade anthrax which killed five people.

In the wake of Sept 11th, the anthrax attacks caused panic throughout the States and around the world. But has the FBI found the whole case too hot to handle? Our science editor Susan Watts reported from Washington.