More and more it looks like there has been significant cover up of Fukushima radiation risk. Arnie Gundersen is a nuclear plant design engineer and describes current situation in a short 5 minute video here.
Next, listen to Maggie Gundersen talk to Marco Kaltofen who is an air quality radiation specialist with some pretty important information on hot particles spreading from Japan to the US.
Lastly listen or read transcript of Arnie Gundersen / Chris Martensen interview...pretty amazing stuff and if Number 4 reactor collapses look out for huge radiation.