Col. Gary E. Johnston, from left, Maj. Gen. Meredith “Bo” Temple, Col. Kevin J. Wilson and Dr. Jeffery P. Holland take part in Thursday’s change of command ceremony at the U.S. Army Engineer Research and Development Center. Johnston is the outgoing ERDC commander; Temple is deputy commanding general of the U.S. Army Corps of Engineers; Wilson is the incoming ERDC commander; and Holland is ERDC’s director.