First Lt. Russell W. Hromadka, a UH-1Y Huey pilot with Marine Light Attack Helicopter Squadron 169, 3rd Marine Aircraft Wing (Forward), gives the commandant of Marine Corps, Gen. James F. Amos, a demonstration of how to utilize the Geographical Reference Group on the iPad, Dec. 23. Amos, along with Sgt. Maj. Carlton W. Kent, sergeant major of the Marine Corps, visited several bases throughout Afghanistan to wish the troops merry Christmas. - First Lt. Russell W. Hromadka, a UH-1Y Huey pilot with Marine Light Attack Helicopter Squadron 169, 3rd Marine Aircraft Wing (Forward), gives the commandant of Marine Corps, Gen. James F. Amos, a demonstration of how to utilize the Geographical Reference Group on the iPad, Dec. 23. Amos, along with Sgt. Maj. Carlton W. Kent, sergeant major of the Marine Corps, visited several bases throughout Afghanistan to wish the troops merry Christmas.