some resources we do have:
per NBC's sources stated the Japan nuclear site and its surroundings are being monitored by a variety of U.S. aircraft, including:
* U-2 spy planes. The U-2s, flying out of Okinawa, have "radiation suites" that can take readings at various altitudes.
* Global Hawk drone.The Global Hawk remote-controlled plane, now on its second run, has multispectral imaging capabilities, including thermal infrared and synthetic aperture radar. Kyodo News Service quoted Japanese government sources as saying that the Global Hawk was taking images of the inside of the reactor buildings.
* WC-135 Constant Phoenix aircraft. One radiation-sniffing WC-135, basically a converted Boeing 707 jet, is on its way from Offutt Air Force Base in Nebraska to the area around Japan, where it will take atmospheric readings.
[link to cosmiclog.msnbc.msn.com
These are some of the things available to usa to cross check the radiation levels(numbers) we are being given as
there is concern the real depth of danger is being minimized publicly
[link to www.mediafreedominternational.org
[link to www.morningstar.ca