TIANJIN, CHINA - AUGUST 13: (CHINA OUT) A screenshot of a video showing the aftermath of the Tianjin's warehouse explosion site on August 13, 2015 in Tianjin, China. The death toll from Wednesday warehouse explosions in Tianjin rose to 50 Thursday evening, 17 of whom were firemen, local authorities said.  (Photo by VCG/VCG via Getty Images)