MADISON, Wis. (AP) — Two senior employees at a Wisconsin corn plant have been sentenced to two years in prison for falsifying records and obstructing an investigation into a fatal corn dust explosion in 2017. U.S. District Judge James Peterson sentenced 50-year-old Derrick Clark of Waunakee and 45-year-old Shawn Mesner of Readstown on Thursday for their convictions last October on multiple safety, environmental and fraud charges. Clark was Didion Milling’s vice president of operations. Mesner was the company’s former food safety superintendent. They are among several Didion employees found guilty in connection with the explosion, which killed five people at the company’s Cambria corn mill.