Possibility of World War III?

While most of us probably feel that a slow economic or even dyanmic economic collapse is a much more likely scenario for SHTF, nobody should discount conventional attack or attacks using Weapons of Mass Destruction/Effect by terrorists groups to either precipitate the collapse or to add speed and chaos to an already impending economic collapse. When you think about people on foot, or trucks or even ultra light aircraft bringing loads of narcotics across the U.S.-Mexican border each day, how hard would it be to bring in four pounds of a biological toxin?,.....or chemical weapons?,......or, God forbid, a small nuclear device? When you add the growing anger along socio-economic groups and what seems to be an agenda among many to divide us racially, we have a wide and immense catastophy sitting in front of us. The video below is long, but worth watching and it certainly gives us a lot to think about.