Climate Central: With the East Coast under a seeming barrage of ice and snow this winter and parts of the West facing record drought, Climate Central chief climatologist Heidi Cullen was front and center on "This Week" with George Stephanopoulos talking about climate change and extreme weather. Cullen was joined by North Carolina Gov. Pat McCrory, Los Angeles Mayor Eric Garcetti, ABC News senior meteorologist Ginger Zee, and ABC News chief business and economics correspondent Rebecca Jarvis.