In Japan, workers are struggling to gain control over reactors at the Fukushima Dai-ichi power plant damaged by last Friday's earthquake and tsunami. Reactor No. 3 is perhaps in the direst condition â€” with damaged fuel rods, a possible breach in the containment system and smoke rising from the reactor. Japan aborted a helicopter mission to dump water on the reactor Wednesday evening. Michele Norris talks to NPR's Richard Harris.