S42E188: September 20, 2017

Wednesday on the NewsHour, the death toll climbs in Mexico after a 7.1 magnitude earthquake destroys scores of buildings, including a school. We examine the science behind the devastation. Also: Hurricane Maria pummels Puerto Rico, Republicans' latest effort to replace Obamacare, an interview with Michael Bloomberg, Russia flaunts its strength and the business of smuggling across the U.S. border.