Rob Gifford, foreign correspondent, NPR
Nell Greenfieldboyce, science desk reporter, NPR
Dr. Harold Swartz, professor of radiology and medicine, Dartmouth College
Workers were forced to evacuate from Japan's Fukushima Dai-ichi nuclear plant Monday, putting efforts to restore the plant's cooling systems on hold. Residents and officials also face concerns about radiation-tainted food and water, while essential supplies remain scarce across northeastern Japan.