NASA September 9, 2017 10:22 am Irma, Most Powerful of Three Atlantic Hurricanes, Approaches Florida The threat of Hurricane Irma is apparent in both its size, as shown in NASA imaging, as well as its trail of destruction, which rescuers attempt to mitigate. US & World Videos 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 1:45 NYPD enters Columbia University in riot gear to clear protest 3:40 UCLA promises more police, disciplinary action amid protest