Geoff Odlum (right), an exercise support contractor, briefs as a foreign service officer during the Rehearsal of Concept drill at Command Post Exercise – Functional (CPX-F) 21-02 at Ft. McCoy, Wis., June 5, 2021. As a contracted role player, Odlum adds a layer of detailed coordination and realism to the exercise that troops are seldom able to replicate at home station.