NEW YORK, United States (AFP) — Billionaire investor Warren Buffett has taken stakes in three large US airlines, in a $1.3 billion bet that marks a sharp U-turn of his antagonistic views on the sector. Buffett’s Berkshire Hathaway Inc. invested $797 million in American Airlines, $249 million in Delta Air Lines and $237 million in United Continental Holdings, according to a regulatory filing reviewed Monday by AFP. Berkshire Hathaway also took a stake in Southwest […]