ELLSWORTH AIR FORCE BASE, S.D. - Master Sgt. Scott Vesperman, 28th Security Forces Squadron intelligence section chief, gives Col. Jeffrey Taliaferro, 28th Bomb Wing commander, a safety brief on the safe and responsible operation of an all-terrain vehicle he will use to check the base perimeter, Nov. 5. Colonel Taliaferro, along with other commanders from the base, checked the perimeter with security forces Airmen, to ensure its integrity. (Courtesy photo /Master Sgt. Carlos Moore)