Dennis A. Dennis A. serves as Senior Pastor and ministers in the Middle East. He is passionate about discipleship and evangelism, speaks at missions training events on End Times topics, and takes part in short-term missions to unreached people groups and discipleship movements. Ariella K. MD, PhD. Doctor Ariella K. is a neurologist and neuroscientist based in the United States who actively serves the medical and spiritual needs of unreached people groups. She frequently leads short-term mission trip teams to those areas, as well as educating and training those interested in participating in the Great Commission. She has just begun working on computerizing clinical data from unreached population groups in the hopes of identifying the optimal care strategies.