Inspectors visited the site -- referred to as the Karbala Ammunition Filling Plant -- on February 23.

CNN: U.S.: Mobile labs found in Iraq

In February, U.N. weapons inspectors "found nothing untoward" at an ammunition filling plant close to where the troops have found the mobile labs, a U.N. inspection team spokesman said Monday.

CNN: U.S.: Mobile labs found in Iraq

The plant's operator, Tepco, had intended to cool reactor 1 by filling the containment chamber with water.

BBC: Japan nuclear: Tepco halts Fukushima cooling plan