PHNOM PENH – United States President Joe Biden landed on Saturday in Cambodia, where he is set to meet with leaders of the 10-nation Association of South-east Asian Nations to emphasise his vision for a free and open Asia-Pacific to counter China’s growing military and technological assertiveness. The trip to South-east Asia is Mr Biden’s first since his presidency, and comes at a time when Washington is seeking to advance its role as a security partner among Asian nations that count on China as its biggest trading partner. The White House has said it is hoping Mr Biden’s trip to...