Complex sentence: Reactivated under Strategic Air Command (SAC) in 1963, it replaced a provisional B-52G Stratofortess squadron at Amarillo AFB, Texas.It performed intercontinental training and deployments, also standing nuclear alert.
Split into simpler sentences: Reactivated under Strategic Air Command in 1963, replacing provisional B-52G Stratofortess squadron at Amarillo AFB, Texas. Performed intercontinental training and deployments, also standing nuclear alert.