January 6, 2014 6:14 am Deep Freeze Grips Much of US Temperatures could plummet to record lows across much of the US, as a “polar vortex” brings extremely cold air and powerful winds to much of the US. Wind Chill Warnings are in effect from Montana to Alabama. US & World Videos 1:36 Arizona Senate repeals 1864 abortion ban 3:37 4.1-magnitude earthquake shakes Corona 1:40 Democrats say Big Oil misled public for decades about climate change 2:56 Police putting up barricades on UCLA campus after overnight brawl 4:00 Firecrackers thrown at pro-Palestinian encampment during protester clash at UCLA