OFFUTT AIR FORCE BASE, Neb. --   Luke Iverson and his brother Lane, sons of Master Sgt. Mike Iverson, 55th Security Forces Squadron flight chief, compete with one another to be the last sibling standing on the Key Log at the base lap-pool located in the Offutt Field House on Jan. 13, 2018. The Key Log is a synthetic log filled with water to replicate a traditional cedar log used in log rolling competitions. (U.S. Air Force photo by Josh Plueger)