A Japanese peace research institute discovered in March that an additional subcritical nuclear test was added to a U.S. tally due to a change in its criteria, with a series of plutonium experiments from 2007 now being grouped together to represent a single test.
Citizens urge 8 parties to back U S no-first-use nuke policy | The Asahi Shimbun: Breaking News, Japan News and Analysis asahi.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from asahi.com Daily Mail and Mail on Sunday newspapers.