An Airman runs 4.5 miles along Heritage Lake as part of the Police Week Ruck Challenge at Ellsworth Air Force Base, S.D., May 13, 2019. The ruck challenge was organized by the 28th Security Forces Squadron in recognition of National Police Week, an observance that was designated by former President John F. Kennedy in 1962. (U.S. Air Force photo by Airman 1st Class Christina Bennett)