Senior Airman John Baller, 28th Force Support Squadron fitness specialist, sprays silicone lubricant on the joint of a fitness machine at the Bellamy Fitness Center during routine maintenance on Ellsworth Air Force Base, S.D., March 13, 2012. Fitness equipment is tested and lubricated each week to ensure all moving parts operate smoothly and properly. (U.S. Air Force photo by Airman 1st Class Alystria Maurer/Released)