Eight months after a tsunami caused a nuclear accident in Japan, ordinary people are using new technology and the power of crowdsourcing to find radiation hotspots. The government isn’t sharing their data, so it’s up to the people to do it led by computer hackers. The PBS NewsHour reports on a grassroots group called Safecast that is crowdsourcing data on radiation contamination from locations around Japan. While in Tokyo, reporter Miles O’Brien spoke to Hari Sreenivasan about his conversations with Safecast workers, Japanese officials and Japanese residents eager for more information about the consequences of the nuclear accident.

Safecast Crowdsources Radiation Map for Japan

Crowdsources Radiation Map for Japan