FILE - In this March 20, 1995 file photo, subway passengers affected by sarin nerve gas in the central Tokyo subway trains are carried into St. Luke's International Hospital in Tokyo. Tuesday, March 20, 2018 marks 23 years since members of the Aum Shinrikyo cult punctured plastic bags to release sarin nerve gas inside subway cars, sickening thousands and killing 13. Cult leader Shoko Asahara and a dozen followers have been sentenced to death for that and other crimes that killed 27 in all. (AP Photo/Chiaki Tsukumo, File)