A Mattis like warning for North Korea
...The message is that they are not going to extort concessions again and they are not going to be allowed to become a nuclear threat to the US and its allies. If they are worried about regime change, their actions will, in fact, provoke it if they don't stand down.
"The DPRK must choose to stop isolating itself and stand down its pursuit of nuclear weapons," he added. "The DPRK should cease any consideration of actions that would lead to the end of its regime and the destruction of its people."
"The DPRK regime's actions will continue to be grossly overmatched by ours and would lose any arms race or conflict it initiates," Mattis said.
Mattis said the U.S. is working diplomatically to resolve the threat over the North's burgeoning nuclear missile program but its coalition of allies "now possess the most precise, rehearsed and robust defensive and offensive capabilities on Earth."