sentences:  The U.S. Joint Chiefs of Staff agreed.Unlike Operation Barrel Roll and "Steel Tiger," however, the bombing in the new area would be conducted by aircraft of the Republic of Vietnam Air Force and by U.S. Air Force units based in South Vietnam (aircraft participating in "Barrel Roll" and "Steel Tiger" were generally based in Thailand).By the end of 1968 and the absorption of "Tiger Hound" operations by Operation Commando Hunt, 103,148 tactical air sorties had been flown over Laos.