California September 23, 2019 12:28 pm ‘Change Is Coming Whether You Like it or Not': Greta Thunberg Climate change activist Greta Thunberg, 16, spoke at the United Nations Climate Change Action Summit on Monday. US & World Videos 1:36 WATCH: Some of the most talked about looks at the Met Gala 3:15 NSC reviewing cease-fire proposal: ‘I don't know that it gets any more sensitive than it is right now' 2:23 Climate change is moving Tornado Alley and driving more tornado outbreaks 1:47 Reese Witherspoon and Ryan Phillippe's daughter Ava calls out body shamers 1:41 Trump fined additional $1,000 for gag order violation and threatened with jail