U.S. Air Force Col. Thomas Blazek, 1st Weather Group (WXG) commander, relinquishes command of the 1st WXG to U.S. Air Force Col. Brian Pukall, 557th Weather Wing commander, during a change of command ceremony July 24, 2018, at Offutt Air Force Base, Nebraska. Blazek will be retiring from the Air Force after 27 years of service. (U.S. Air Force photo by Paul Shirk)