president xi jinping. china of course is key in having sanctions be effective because of the trade and energy that flows between the two countries. latest set of measures that was voted on by the u.n. security council, the toughest set yet, still had to be watered down in order to secure the necessary support from china and russia. so the subtext to that, stephanie, is that sanctions are at their max. even nikki haley is admitting that it's going to take some time to see them through. so add into that a lot of military messaging as well. with those joint drills that were held today over the korean peninsula. the u.s., japan, south korea, flying super sonic bombers and stealth jets, using live weapons to try to increase the pressure on pyongyang. one defense official in south korea's defense ministry said that it was a very rare maneuver that they performed today in having these aircraft go quite close to the demarcation line between north and south korea. so this is all trying to ininvestigation the pressure to