President Trump said Saturday that North Korean leader Kim Jong Un has a "one-time shot" to show he's serious about a nuclear disarmament deal. "I feel that Kim Jong Un wants to do something great for his people and he has that opportunity," Trump said at a press conference just before he departed a G-7 summit in Charlevoix, Canada, for his historic Tuesday rendezvous with Kim in Singapore. "He won't have that opportunity again." He predicted it won't take him long to figure out whether Kim is genuinely interested in a making a deal that includes denuclearization. "I think within the first minute, I’ll know — just my touch, my feel," he said.