the-united-states-said-on-friday-it-was-imposing-its-largest-package-of-sanctions-to-pressure-north-korea-to-give-up-its-nuclear-missile-program-and-president-donald-trump-warned-of-a-quot-phase-two-quot-that-could-be-quot-very-very-unfortunate-for-the-world-quot-if-the-steps-did-not-work-in-addressing-the-trump-administration-s-biggest-national-security-challenge-the-u-s-treasury-sanctioned-one-person-27-companies-and-28-ships-according-to-a-statement-on-the-u-s-treasury-department-s-website-the-united-states-also-proposed-a-list-of-entities-to-be-blacklisted-under-separate-u-n-sanctions-a-move-quot-aimed-at-shutting-down-north-korea-s-illicit-maritime-smuggling-activities-to-obtain-oil-and-sell-coal-quot-north-korea-has-been-developing-nuclear-tipped-missiles-capable-of-reaching-the-u-s-mainland-and-trump-and-north-korean-leader-kim-jong-un-have-exchanged-taunts-that-have-raised-fears-of-war-in-august-trump-threatened-to-go-beyond-sanctions-by-bringing-quot-fire-and-fury-like-the-world-has-never-seen-quot-although-his-administration-has-repeatedly-said-it-prefers-a-diplomatic-solution-to-the-crisis-speaking-at-a-news-conference-with-australian-prime-minister-malcolm-turnbull-trump-made-apparent-reference-to-military-options-his-administration-has-repeatedly-said-remain-on-the-table-quot-if-the-sanctions-don-t-work-we-ll-have-to-go-phase-two-quot-trump-said-quot-phase-two-may-be-a-very-rough-thing-may-be-very-very-unfortunate-for-the-world-but-hopefully-the-sanctions-will-work-quot-the-sanctions-targets-include-a-taiwan-passport-holder-as-well-as-shipping-and-energy-firms-in-mainland-china-hong-kong-taiwan-and-singapore-the-actions-block-assets-held-by-the-firms-and-individuals-in-the-united-states-and-prohibit-u-s-citizens-from-dealing-with-them-the-u-s-treasury-said-the-sanctions-were-designed-to-disrupt-north-korean-shipping-and-trading-companies-and-vessels-and-further-isolate-pyongyang-they-also-are-aimed-at-ships-located-registered-or-flagged-in-north-korea-china-singapore