Complex sentence: The USAF Strategic Air Command (SAC) had T-38 Talons in service from 1978 until SAC's deactivation in 1991.These aircraft were used to enhance the career development of bomber co-pilots through the "Accelerated Copilot Enrichment Program".
Split into simpler sentences: The USAF Strategic Air Command (SAC) had T-38 Talons in service from 1978 until SAC's deactivation in 1991. These planes were used to enhance the career development of bomber co-pilots through the "Accelerated Copilot Enrichment Program".