A 25-year-old Clarkston, Georgia, man was killed at 7:48 Sunday morning on I-44 at the 200-mile marker in Phelps County. The Missouri Highway Patrol reports that a tractor-trailer driven by Mohamed D. Aden ran off the left side of the highway and collided with another tractor-trailer that was left in the median following an earlier crash. Aden was pronounced deceased at the scene. A passenger in his truck, 25-year-old Adow G. Hassen, also of Clarkston, Georgia, suffered serious injuries and was transported to Phelps Health in Rolla. Both occupants were wearing a safety device.