BEIJING - The United Nations must show it is tough enough to ensure the security of its members so that individual countries do not take measures into their own hands, UN Secretary-General Kofi Annan said on Monday. Speaking to Chinese university students in Beijing, Annan said fighting terrorism was best achieved through cooperation and information-sharing between states, not the use of force. “Indeed, the first purpose of the United Nations, laid down in Article 1 of the Charter, is ’to take effective collective measures for the prevention and removal of threats to the peace’,” Annan said. “We must show that...