Senior Airman Jessica Aadalen, 28th Civil Engineer Squadron readiness and emergency management journeyman, leads the Civil Engineer Squadron's readiness warriors in a caterpillar push-up during the fitness survivor challenge, Dec. 07. Teams have to do a push-up together while their legs are on the person behind them and last person is doing a regular push-up. (U.S. Air Force photo / Airman 1st Class Joshua Seybert)