French soldiers began direct combat with Mali-based Islamists in the central town of Diabaly on Wednesday, according to security sources, while President François Hollande said the war effort was “necessary and legitimate” in a speech in Paris. French special forces began fighting on the ground with Islamist rebels in central Mali on Wednesday, according to regional security sources, six days after the European power launched an air offensive in the country. “The special forces are currently in Diabaly, engaged in fighting with the Islamists. The Malian army is also on site,” the AFP news agency quoted a Malian security source...