LOUISVILLE, Ky. (BP) -- "Stay in the story." That's the advice retiring missionaries Nik and Ruth Ripken offer the next generation. "Don't quit before you see all that God has for you," Ruth said. "Don't get sidetracked." The Ripkens, known for their extensive research into Christian persecution, have relocated to Louisville, Ky., having signaled their retirement for March 2020 after 35 years of service with the Southern Baptist International Mission Board.