Marines and foreign security role players are searching a car going through a vehicle check point when a simulated improvised explosive device explodes during a Situational Training Exercise Nov. 20 and 21 on Range 220A aboard the Combat Center. The skills they learn from this small portion of overall training will prepare the Marines for a more thorough Mission Rehearsal Exercise directly following. - Marines and foreign security role players are searching a car going through a vehicle check point when a simulated improvised explosive device explodes during a Situational Training Exercise Nov. 20 and 21 on Range 220A aboard the Combat Center. The skills they learn from this small portion of overall training will prepare the Marines for a more thorough Mission Rehearsal Exercise directly following.