Complex sentence: Reactivated in 1953 as a Strategic Air Command B-36 Peacemaker intercontinental strategic bombardment squadron, it engaged in worldwide strategic bombardment training and stood nuclear alert until 1956 when the B-36 was retired.
Split into simpler sentences: Reactivated in 1953 as a Strategic Air Command B-36 Peacemaker intercontinental strategic bombardment squadron. Engaged in worldwide strategic bombardment training and stood nuclear alert until 1956 when the B-36 was retired.