TULLE, France - France's military intervention in Mali will last as long as it takes to overcome terrorism in the region, President Francois Hollande said on Saturday."People often ask how long this will last. I reply, the time it takes. The time it takes to vanquish terrorism in this area," he said.Hollande, who ordered French fighter jets into action in Mali a week ago to halt an Islamist advance, also said a hostage crisis at a desert gas plant in Algeria offered further evidence that France's action in the region was justified.He said attempts by the Algerian authorities to root out the hostage-takers were under way but that reports were now coming in that the operation had come to an end."Hostages have been killed, assassinated in cowardly fashion," Hollande said.