Secretary of State Rex Tillerson said that it may be necessary to take pre-emptive military action against North Korea if the threat of their nuclear weapons program gets to a point "that we believe requires action," reports the AP.
Tillerson is in South Korea today. His response when asked if the U.S. would use military force against the North:
All of the options are on the table ... but obviously if North Korea takes actions that threatens South Korean forces or our own forces, that would be met with [an] appropriate response...