1 of 2 | U.S. President Joe Biden addresses a press conference in Hanoi on Sunday, the first day of a visit in Vietnam. Photo by The White House/ UPI | License Photo Sept. 10 (UPI) -- U.S. President Joe Biden signed a deal Sunday with Vietnam to boost cooperation on a range of areas from semiconductors to rare earth minerals, while the Southeast Asian nation elevated the United States to its highest tier of diplomatic partnership some five decades after what Biden called the "bitter past" of the Vietnam War. Biden stopped in the Vietnamese capital of Hanoi on...