Chief Master Sgt. Brian Lewis, chief enlisted manager, 90th Security Forces Group, gives a motivational speech to the participants of the Crow Creek Challenge at the SFG headquarters building on F.E. Warren Air Force Base, Wyo., Sept. 22, 2017. This is the 23rd year the Crow Creek Challenge has put the 90th Missile Wing’s defenders’ mental and physical capabilities to the test. (U.S. Air Force photo by Airman 1st Class Braydon Williams)