DAMASCUS, Syria (AP) — Syrian government forces backed by Russian airstrikes drove Islamic State fighters from Palmyra on Sunday, ending the group's 10-month reign of terror over a town whose famed 2,000-year-old ruins once drew tens of thousands of visitors each year.Government forces had been on the offensive for nearly three weeks to try to retake the central town, known among Syrians as the "Bride of the Desert," which fell to the extremists last May.