Founded 12 years ago by Mike Bickle, a self-trained evangelical pastor, with a group of 20, the International House of Prayer, in a former strip mall, now draws tens of thousands of worshipers to its revival meetings. A wholly devoted cadre of 1,000 staff members, labeled missionaries, have given up careers to move here, living off donations and spending several hours a day in the prayer hall to revel in what they describe as direct communication with God. Another thousand students attend the adjacent Bible ...