U.S. Marine Corps Lt. Col. Matthew J. Grabowski, center, the commander of troops during the 4th Marine Corps District Change of Command ceremony, receives orders from the new district commanding officer, Col. Heather J. Cotia, left, during the district change of command ceremony at the West Shore Country Club, Camp Hill, Pennsylvania, July 16, 2020. Col. Robert M. Clark relinquished his command to Cotoia after three years commanding the 4th Marine Corps District. (U.S. Marine Corps Photo by Cpl. Cody J. Ohira) - U.S. Marine Corps Lt. Col. Matthew J. Grabowski, center, the commander of troops during the 4th Marine Corps District Change of Command ceremony, receives orders from the new district commanding officer, Col. Heather J. Cotia, left, during the district change of command ceremony at the West Shore Country Club, Camp Hill, Pennsylvania, July 16, 2020. Col. Robert M. Clark relinquished his command to Cotoia after three years commanding the 4th Marine Corps District. (U.S. Marine Corps Photo by Cpl. Cody J. Ohira)