For nearly nine months the congressional investigations of the Central Intelligence Agency have been conducted behind closed doors. In the old Senate caucus room the ten members of the select Senate committee were questioning CIA officials, including Director William Colby and the deputy director for science and technology, Sayre Stevens, about 11 gm. of shellfish toxin and 8 mg. of cobra venom discovered last May in a CIA storeroom. Colby revealed that the agency in 1952 began a supersecret research program, code-named M.K. Naomi, partly to find countermeasures to chemical and biological weapons that might be used by the Russian KGB. CIA researchers ... came up with an array of James Bond weaponry that could use the shellfish toxin and other poisons as ammunition. To illustrate his testimony, Colby handed a pistol to Committee Chairman Frank Church. Resembling a Colt .45 equipped with a fat telescopic sight, the gun fires a toxin-tipped dart, almost silently and accurately up to 250 ft. Moreover, the dart is so tinythe width of a human hair and a quarter of an inch longas to be almost indetectable, and the poison leaves no trace in a victim's body. Charles Senseney, an engineer for the Defense Department, told the Senators that he had devised dart launchers that were disguised as walking canes and umbrellas.