Definition: Given a document, generate a short title of the document. The title should convey the main idea/event/topic about which the document is being written. Note that URLs in the text have been replaced with [Link].
Input: Washington (CNN)  Sen. Lindsey Graham  R-South Carolina   warned against a potential conflict with North Korea "if things don't change."
"If we have to go to war to stop this  we will "  Graham  told CNN's Wolf Blitzer on Tuesday. "If there's a war with North Korea it will be because North Korea brought it on itself  and we're headed to a war if things don't change."
 Graham 's comments on CNN's "The Situation Room" come amid rising tension between the US and North Korea  and on Tuesday  the Pentagon confirmed that North Korea had launched what the US military believes to be an intercontinental ballistic missile.
 Graham  clarified that  he  doesn't think war would be the best outcome but said the US won't let Kim Jong Un have the ability to strike America's mainland.

Graham on North Korea: 'We're headed to a war if things don't change'