Donald Trump and Kim Jong-un meet Wednesday in Hanoi for the second date in an unlikely friendship that the United States (US) president hopes will push North Korea's reclusive leader closer to reaching a deal on his nuclear arsenal.Trump touched down late Tuesday on Air Force One after flying half way around the world from Washington, while Kim arrived earlier, following a two-and-a-half-day train journey from Pyongyang.On completing their marathon trips, the protagonists of internation