sentences:  The need for this type of training became apparent after C-130 units from the Military Airlift Command (MAC) began to participate in Red Flag at Nellis AFB.It was obvious that the C-130's were not doing well against the ground and air threats posed in the Red Flag exercise.After approval from the National Guard Bureau and tacitly from Military Airlift Command (MAC), they began service test to validate the training program.