First time since the earthquake.
From Level 5 to a Level 7.
A month after the tsunami.
"Our nuclear plants are like snowflakes."
Contamination is spreading farther away from the plant.
Workers waded into water with 10,000 times the normal level of radiation.
Officials say tap water is once again safe for infants.
More than twice the allowable amount for infants.
"You could lose all six of the reactors."
It's a last-ditch effort to avoid a meltdown.
The U.S. urges Japan to vastly expand its evacuation zone.
As radiation levels soar, only 50 workers remain at the troubled plant.
New worries over spent fuel rods.