(Oklahoma City, Oklahoma-AP) -- The Reverend Billy Graham is in Oklahoma City where a four-day mission begins tomorrow night. The 84-year-old evangelist rode into the Ford Center arena on a white golf cart yesterday to discuss the event with a throng of reporters and photographers. Graham carried a small black bible in his hand and stood stiffly before the media after he was helped out of the golf cart. Organizers are expecting up to 40-thousand people to attend each service Thursday through Sunday nights. This is at least Graham's fourth visit to Oklahoma City. His last visit followed the 1995 Oklahoma City bombing, when he preached during a service with President Clinton. He has visited the Oklahoma City Bombing National Memorial twice during his latest visit. There were missions, then called crusades, in 1956 and 1983.