First sergeants from Ellsworth Air Force Base, S.D., attempt to cross an obstacle during a Leadership Reaction Course at the South Dakota National Guard West Camp Rapid training facility, Rapid City, Sept. 15, 2016. This challenge, along with a few others, demanded a great deal of trust among the participants in order to achieve the given task. (U.S. Air Force photo by Airman 1st Class Donald C. Knechtel)