Just days ahead of US President Joe Biden’s visit to Vietnam for key talks on trade and closer diplomatic relations, the president paid homage to events from an earlier and very different time – when Washington and Hanoi were at war. At the White House on Tuesday, Biden presented the Medal of Honor, the United States military’s highest award, to 81-year-old Larry Taylor, a retired army captain who had flown a Cobra attack helicopter during the height of the Vietnam War in 1968. — When Biden lands at Hanoi’s Noi Bai International Airport on Sunday, he steps into a very...