(Oklahoma City-AP) -- Oklahoma City Mayor Kirk Humphreys, chairman of the Billy Graham mission to his city, plans to give his own testimony tonight. He says the mission is not about one's church or denomination, or even beliefs about God, but about one's "relationship with Jesus Christ." Humphreys says Dr. Graham is physically frail, but quite sharp with an excellent memory of his first Oklahoma City crusade nearly 50 years ago. He says Graham is like an "old warrior" eager to stay in the battle. He says Graham seems "empowered" when he begins to preach the gospel.