WASHINGTON – Military and civilian defense officials improperly used government credit cards to buy 68,000 first-class or business-class airline seats when they were supposed to fly coach, congressional investigators concluded Thursday. Several high-ranking political appointees were among the 44,000 people who bought premium tickets that cost $124 million over two years. The investigators' report did not estimate how much extra money that meant, but coach tickets typically range from a few dollars to thousands of dollars less. "Our goal today is to ground the high flier who abuse the system and to ensure DOD (Department of Defense) is committed to...