Friends and family of Sgt. 1st Class Kristoffer B. Domeij (DOH'-meej) gathered Monday in Lawton for a ceremony. Officials say the classroom used for Fort Sill's Joint Fires Observer course is now known as Domeij Hall.
Domeij, a native of Santa Ana, Calif., was killed in October 2011 with two other soldiers in Kandahar province.
The commander of Domeij's unit, Lt. Col. Greg Anderson, says Domeij was stationed at Fort Sill early in his career and returned to learn joint fires.
The facility trains soldiers on the ground to communicate and give directions to soldiers in the air. Officials say Domeij graduated from Fort Sill's JFO course in 2005.