Japan Strains to Thwart Nuclear Meltdown at Three Reactors

Aired: 3/14/2011 | 0:09:28 | Clip
Authorities worked to bring three nuclear reactors under control after cooling systems were knocked out when a massive earthquake struck Japan. Gwen Ifill talks to NewsHour correspondent Miles O'Brien and David Brenner of Columbia University's Center for Radiological Research about the science behind Japan's nuclear power.