korea, the pentagon taking on a brand-new warning, sending this out to north korea today after the rogue nation detained an american system this weekend and threatened to sink a u.s. aircraft carrier. a pentagon spokesman warns north korea to refrain from provocative destabilizing action and rhetoric. the american was stopped before he attempted to fly out of the country. we're told tony kim, that's his name, he had just finished teaching for several weeks at pyongyang university of science and technology. but we don't know why he was detained. president trump is set to talk with japan's prime minister and china's president tonight and the topic of north korea will likely be a big focus. still ahead this hour, countdown in washington in what could be the most impactful week of trump's presidency. health care, tax reform, and government spending are all on the table. we have brand-new poll numbers ahead of the president's 100th day in office. and later, a frightening moment captured on camera. watch this. >> i saw it happening and it blew my mind. it was kinda like i wasn't even