Soldiers with the 90th Troop Command, Oklahoma Army National Guard welcomed a new commander while honoring another during the brigade change of command at Camp Gruber Training Center in Eastern Oklahoma, May 14, 2022. Col. Lars B. Ostervold Jr. handed command of the brigade to Col. Robert W. Walker in front of Soldiers from across the units that make up 90th Troop Command. The ceremony began with the passing of colors to represent the transfer of authority from Ostervold to Walker in the time-ho