FILE - In this Sept. 2, 2015, file photo, an F-35 jet arrives at its new operational base at Hill Air Force Base, in northern Utah. The top U.S. diplomat overseeing arms sales said Monday, Feb. 5, 2018, she would be promoting American weaponry at the largest air show in Asia, where China’s military footprint and political influence are surging. A large U.S. delegation at the Singapore Air Show is doing “everything we can” to encourage Southeast Asian governments to purchase U.S.-made arms like the F-35 fighter jet, Ambassador Tina Kaidanow told reporters in a telephone briefing. She repeatedly...