Japan memorialized the more than 190,000 people who were killed one year ago when a magnitude-9.0 earthquake struck the northeastern coast and triggered a devastating tsunami that crippled the Fukushima Dai-ichi nuclear plant. Emperor Akihito led millions of citizens in a minute’s silence at a ceremony in Tokyo’s National Theatre. “This is a difficult period, but we must overcome it,” he said. According to official data, more than 340,000 people are still living in temporary homes. The quake struck at 2:46 p.m. on March 11 last year and triggered a tsunami that was 128 feet tall at its highest point, laying waste to entire towns as it came ashore.