Fix lack of logic problems in the following paragraph:
The 4321st was a Major Command controlled (MAJCON) wing and SAC wanted to replace it with a permanent unit. A Major Command controlled (MAJCON) wing could not carry a permanent history or lineage.
The 4321st was a Major Command controlled (MAJCON) wing, which could not carry a permanent history or lineage, and SAC wanted to replace it with a permanent unit.