FILE - In this May 7, 2018 file photo, Berkshire Hathaway Chairman and CEO Warren Buffett speaks during an interview in Omaha, Neb. The billionaire Haslam family says in a lawsuit that Warren Buffett and Berkshire Hathaway are trying to artificially depress the price the company is obligated to pay for the family's remaining 20% stake in the Pilot Travel Centers truck stop chain that Jim Haslam found. (AP Photo/Nati Harnik, File) MAY 7, 2018 FILE PHOTO
