Mattis warns of risk of war if NKorea fires at US soil

Defense Secretary Jim Mattis warned Monday that an attack by North Korea against the United States could quickly escalate into war, and said the military would try to shoot down any missile that threatened Guam."If they fire at the United States, it could escalate into war very quickly," Mattis told Pentagon reporters.Mattis's comments came after he and Secretary of State Rex Tillerson said America has "no interest" in regime change in Pyongyang or the accelerated reunification of the two Koreas