Robert Bazell, NBC News' senior science correspondent, just returned from several weeks of reporting in Tokyo, Japan on the radiation crisis.
Nearly three weeks after a March 11 earthquake and tsunami slammed and engulfed the Fukushima Dai-ichi plant, knocking out cooling systems that keep nuclear fuel rods from overheating, Tokyo Electric Power Co. is still struggling to bring the facility in northeastern Japan under control.
Bazell responded to readers' questions about fears of further radiation leaks.
Click the box below to replay the chat.
See more of Bazell's reporting on NBC's Nightly News with Brian Williams, MSNBC and msnbc.com. Click here for more news on Japan.