SEOUL (Reuters) - U.S. President Donald Trump said on Tuesday that the United States is prepared to use the full range of military force to stop a North Korean attack, but said he was focused on using  all available tools short of military action  to prevent conflict.  North Korea is a worldwide threat that requires worldwide action,  he told reporters at a joint press conference with South Korea President Moon Jae-in. The remarks came after the two leaders held formal talks at the presidential Blue House in Seoul, where Moon told Trump he hoped his visit would relieve some of South Koreans  anxiety over North Korea and serve as a  turning point in resolving the North Korean nuclear issue . 
Trump calls for worldwide action against North Korea nuclear threat