BANGKOK – The United States and Vietnam elevated ties to the highest tier in Hanoi’s diplomatic hierarchy during President Joe Biden’s two-day visit that ends on Monday. Mr Biden, having skipped the Asean Summit over the past week, landed in Hanoi on Sunday afternoon after leaving India, where he attended a Group of 20 summit of leaders from the world’s top economies. He met Mr Nguyen Phu Trong, the general secretary of the Communist Party of Vietnam, and is expected to meet Vietnam President Vo Van Thuong on Monday. US-Vietnam ties on Sunday were raised to that of a “comprehensive...