I copy and pasted this from a thread on Fukushima I am currently reading.

Post Fukushima, the Japanese government enacted anti-sedition laws. Where any conflicting information from the government information is removed from media. Many Japanese mainstream press articles have been purged since March, that were cited in the foreign press. (especially in the Mainichi and NHK)http://www.soumu.go.jp/main_content/000110048.pdfhttp://www.soumu.go.jp/menu_news/s-n..._01000023.html

A new project team has been created by the Ministry of Internal Affairs and Communication, the National Police Agency, and METI to combat “rumors” deemed harmful to Japanese security in the wake of the Fukushima disaster. The government charges that the damage caused by earthquakes and by the nuclear accident are being magnified by irresponsible rumors, and the government must take action for the sake of the public good. The project team has begun to send “letters of request” to such organizations as telephone companies, internet providers, cable television stations, and others, demanding that they “take adequate measures based on the guidelines in response to illegal information. ”The measures include erasing any information from internet sites that the authorities deem harmful to public order and morality.

In Russia the same thing happened post Chernobyl. Especially in terms of the decision to use Liquid Nitrogen. It has been theorized the reason the information was suppressed after intial reporting was because the Russians made an error dropping Liquid Nitrogen directly into the core (Liquid Nitrogen has an expansion rate of 7:1) and it caused a much higher release of radiation which drifted into Belarus post blast. This is certainly open for debate, but the earlier reports were consistant. In terms of utilizing Liquid Nitrogen to stabilize the ground before a cement slab could be poured, this hasn't been debated. And in terms of Fukushima, if the corium is in the wild, I stand by my assertation it would be logical to use Liquid Nitrogen to freeze the substrate under the plant to arrest and cool the corium.