Shares of Talisman Energy Inc. spiralled on the Canadian stock market Thursday over fears the oil and gas giant will be punished for its operations in Sudan, an east African country with a history of sheltering terrorists. Talisman stock fell nearly eight per cent or $4.65 Thursday to $55.85 as the impact of Tuesday's terrorist attack on New York was absorbed by Canadian investors...Talisman - one of Canada's largest independent energy producers - has tirelessly defended its involvement in Sudan as a positive influence helping the war-torn country. But critics charge that Talisman is creating blood money for the Sudanese government to use in a vicious civil war that has raged for at least 18 years.