>> you know what? that looks amazing in the heat. i love it. >> we'll be back at 6:00. >> have a good night institute bring back the dogs, too. >> maybe on a surfboard. tonight -- the president's battles increasing the pressure on north korea to end its nuclear program. the secretary of state turns up the heat. while here at home, president trump takes aim at a sports super star. the immigration fight escalates as nearly 600 children remain separated from their parents. the process of reuniting them gets new scrutiny. a revealing new report about the school shooting suspect in parkland, florida, and what may have driven him to kill. as the economy grows, factories can't hire workers fast enough. some are using robots to fill in the gaps. what happens when the economy falters? and taking care of a summer tradition. we'll visit a place that keeps the country's carousels turning.