U.S. Air Force Master Sgt. Christopher Espinosa, a member of the 509th Medical Operations Squadron, shares a laugh with Air Force Chief of Staff Gen. Mark A. Welsh III at Whiteman Air Force, Mo., Feb. 16, 2016. Welsh met with Airmen and civic leaders during a base tour and held an all call where he expressed his gratitude to the Total Force Airmen and their support of the unique B-2 mission at Whiteman. (U.S. Air Force photo by Senior Airman Joel Pfiester)