1.   Japan plans to shut down its breeder reactor for three months of repairs beginning Wednesday, pushing back a controversial program to produce electricity using highly toxic plutonium.

2.   Richardson apologized to current and former workers at the Paducah plant Thursday, saying the government was not forthcoming about the possibility of exposure to toxic plutonium there.

3.   Highly toxic plutonium is also suspected to have leaked and spread following the accident.

4.   Highly toxic plutonium is suspected to have leaked and spread in the atmosphere.