U.S. President Donald Trump and North Korean leader Kim Jong Un will likely focus on concrete, verifiable denuclearization steps by Pyongyang in return for concessions from Washington, at a two-day summit starting Wednesday in Hanoi.Trump and Kim, who both arrived in the Vietnamese capital Tuesday, are expected to discuss the dismantlement of North Korea's main Yongbyon nuclear complex in exchange for a declaration of a formal end to the 1950-1953 Korean War, or partial sanctions relief.Related coverage:Vietnam expels Kim Jong Un lookalike: reportThe United States aims to hammer out a joint…READ FULL ARTICLE