Complex sentence: It assumed responsibility for the air defense of certain portions of the continental United States until July 1948 controlling several B-29 Superfortress bomb groups (73d, 96th Bomb Wings) and C-46 Commando troop carrier groups (322d Troop Carrier Wing).
Split into simpler sentences: It assumed responsibility for the air defense of certain portions of the continental United States. It controlled several B-29 Superfortress bomb groups (73d, 96th Bomb Wings) and C-46 Commando troop carrier groups (322d Troop Carrier Wing).