(Bloomberg) Southwest Airlines Co. plans to cut capacity this year, halt most hiring and review its spending plans in response to reduced aircraft deliveries from Boeing Co., the planemaker facing regulatory and criminal investigations in the wake of a near-catastrophic accident in January.Most Read from BloombergOne of the Most Infamous Trades on Wall Street Is Roaring BackStock Traders Bracing for Worst Shrug Off Hot CPI: Markets WrapChina Has Never Canceled This Many Shipments of US WheatN