The incident happened at 12:15 on Missouri 17 just west of Missouri 133 in Pulaski County.
Eighty-eight year old Mary Jarboe was driving her 2002 Buick Lesabre north on the road when the vehicle crossed the center line and hit a 1996 Mack truck.
Mary was wearing her seat belt and suffered moderate injuries. She was taken to Fort Leonard Wood hospital. Her passenger, 87-year old Paul Jarboe of Crocker was also wearing a seat belt and suffered serious injuries. He was flown to University Hospital in Columbia by the Staff for Life helicopter. The driver of the truck, 54-year old Kenneth McDowell of Billings, Missouri, was uninjured.