Summary:
Saudi Arabia's king is to have back surgery for the second time in six months, officials say.

Full article:
Saudi Arabia's 87-year-old ruler, King Abdullah, arrived Sunday at a Riyadh hospital to undergo his third back surgery within a year, the Saudi Press Agency reported. Surgeons were to tighten a binding connector around his third vertebra, the agency said. Abdullah last had back surgery in December at New York's Presbyterian Hospital/Weill Cornell Medical Center for a herniated disc and a blood clot that were causing him back pain. He spent several weeks in Morocco undergoing physical therapy. The king first underwent successful surgery on November 24. He had the follow-up operation to stabilize several vertebrae in his spine. Abdullah has ruled the oil-rich kingdom since the August 2005 death of his half-brother, King Fahd. But  Abdullah ran most of the kingdom's affairs for a decade before that on behalf of his ailing sibling.