Any government. Their purpose is to control the masses, not inform them. "Mushroom cloud? What mushroom cloud?" An independent report revealed that the Japanese government downplayed the full danger in the days after the March 11 disaster and secretly considered evacuating Tokyo. Study: Japan feared 'devil's chain reaction' at nuke plant By msnbc.com news services Japan's prime minister ordered workers to remain at the tsunami-crippled Fukushima nuclear plant last March as fears mounted of a "devil's chain reaction" that would force tens of millions of people to flee Tokyo, a new investigative report shows. Then-Premier Naoto Kan and his staff began referring to a worst-case scenario that could threaten Japan's existence as a nation around three days after the March 11 earthquake and tsunami, according to the report by a panel set up by a private think-tank. World News - Study: Japan feared 'devil's chain reaction' at nuke plant