Jay Sowers / The Natchez Democrat — Natchez Fire Department members Lt. Ernest Owens, left, and firefighter Randall Simpson check the levels of their radiation contamination on the two dosimeters they were given during a decontamination drill at Natchez High School on Tuesday evening. Dosimeters are used to detect the amount of radiation a person has been exposed to.

Jay Sowers / The Natchez Democrat — Natchez Fire Department Lt. Robert Arrington, center, uses a survey meter to assess the radiation exposure of a potential victim during the drill.

Jay Sowers / The Natchez Democrat — Natchez Fire Department Capt. Joe Garrity, left, offers final instructions to a number of fire and emergency personnel before the start of the drill. Adams County Search and Rescue and county volunteer firefighters directed traffic at the site.