and keep the public safe. mr. president, are you concerned about north korea at all right now? >> we're watching it. we'll see. i'd be disappointed if something would be in the works, and if it is, we'll take care of it. but we'll see. we're watching it very closely. >> the north koreans say they've conducted two more tests in recent days aimed at countering any nuclear threat from the u.s. today in seoul, the top u.s. envoy on north korea warned that if the north conducts a major weapons test in the coming days, it would be, quote, most unhelpful in the effort to resume peace talks. the north has said the u.s. has until the end of the year to make concessions in these nuclear negotiations. and mind you this is all happening just as we are hearing a devastating story about