South Korea stunned by Trump pledge to halt military drills; Trump: Kim Jong Un "trusts me, and I trust him"; Kim Jong Un leaves Summit with big boost in prestige; Trump gives up military drills for vague Kim promise on nukes; Trump: discussed human rights with Kim "relatively briefly"; Trump shows Kim video imagining North Korea's future; Trump: U.S. to stop "provocative" war games with South Korea; Kim meets Trump, predicts world will see "major change" via Knit