http://www.nytimes.com/2016/05/24/world/asia/vietnam-us-arms-embargo-obama.html?smprod=nytcore-iphone&smid=nytcore-iphone-share HANOI, Vietnam — The United States is rescinding a decades-old ban on sales of lethal military equipment to Vietnam, President Obama announced at a news conference in Hanoi on Monday, ending one of the last legal vestiges of the Vietnam War.