The United States has reiterated that it's time for North Korea to make concrete progress towards denuclearization. <br />U.S. National Security Advisor John Bolton, in an interview with the Washington Times,... said the U.S. needs the regime to show a (quote) "significant sign of a strategic decision to give up nuclear weapons." <br />He added, once that happens, U.S. President Trump can begin to remove sanctions. <br />The North has been asking the U.S. to remove sanctions as one of the corresponding measures from Washington.<br />Asked if Kim Jong-un can be trusted, Bolton said.... the negotiations are between Kim and Trump... and the North Korean leader is prepared to negotiate. <br />