Rising fuel prices have forced Southwest Airlines to raise ticket prices, but the Dallas-based carrier is also focusing on efficiency measures to lower its fuel consumption, president and CEO Gary Kelly said Monday. Southwest Airlines is the busiest carrier at Lambert-St. Louis International Airport. Kelly spoke about the pressures facing the airline during a luncheon to honor the 55-year-old's selection as Dallas Business Journal's North Texas CEO of the Year. "Fuel is just such a huge headline," Kelly...