By Staff Main session speakers have been announced for the 17th World Convention, slated for July 30″”August 3, 2008, at Nashville, Tennessee. The global gathering of the three streams of the Restoration Movement””Christian churches, churches of Christ, and Disciples of Christ””first met in 1930, and has gathered every four years since 1980. Main session speakers for the event will be Cynthia Hale, Bob Russell, Mike Cope, and C. Robert Wetzel (the 2008 convention president). The speakers will explore the convention theme, “Together in Christ.” Cynthia Hale, Wednesday evening”s speaker, is founding pastor of Ray of Hope Christian Church (Disciples of