T Boone Pickens Art Auction

This undated photo provided by Christie's Images Limited 2020 shows the painting "Flags on the Frontier" which is one of the works of art depicting the American West and other items collected by the late Texas oil tycoon T. Boone Pickens. They are expected to sell for more than $15 million at an auction. Christie's announced Thursday, Sept. 10, 2020, that the auction will be held Oct. 28 in New York. (Christie's Images Limited 2020 via AP)