Complex sentence: As the Waterpump mission continued, it was attached to the 606th Air Commando Squadron in 1966; the 606th expanded and became the 56th Air Commando Wing in 1967.
Split into simpler sentences: As the Waterpump mission continued, it was attached to the 606th Air Commando Squadron in 1966. The 606th also expanded and became the 56th Air Commando Wing in 1967.