PARIS - The man known as Carlos the Jackal refused food and water
                 for a sixth full day Monday to protest his treatment in prison, and his
                 lawyers claim he is weakening and preparing mentally for death. Ilich
                 Ramirez Sanchez was once considered the world's most wanted
                 terrorist. He is serving a term of life in prison for the 1975 murders of
                 two French investigators and a Lebanese, and is under investigation for
                 as many as four terrorist attacks in France. Ramirez has been held in
                 solitary confinement since French agents snared him in Khartoum,
                 Sudan, on Aug. 15, 1994, then hauled him to Paris in a sack. His
                 lawyers say Ramirez, 49, began fasting last Tuesday to protest his
                 solitary confinement and other conditions.