Japan Floods Nuclear Reactor Crippled by Quake in Effort to Avert Meltdown  —  TOKYO — Japanese officials took the extraordinary step on Saturday of flooding a nuclear reactor with seawater in a last-ditch effort to avoid a nuclear meltdown, after an explosion there escalated the emergency caused …

Japan's fears of nuclear mayhem recede as nuclear reactor starts to cool  —  Physicists feared second explosion would create radioactive cloud as residents panicked, jamming city's exit roads  —  For a few unnerving hours, Japan faced a bleak and unsettling prospect.

Report: Explosion at Japanese nuclear plant  —  Editor's Note: Read live blogging of the Japan tsunami and earthquake.  Are you there?  Send your video, pictures to iReport.  —  (CNN) — An explosion has been reported at a nuclear plant in northeastern Japan's Fukushima prefecture …

Bachmann makes gaffe in New Hampshire  —  Rep. Michele Bachmann (R-Minn.), a possible presidential contender in 2012, made an embarrassing gaffe Saturday morning in a speech to a group of conservatives in New Hampshire.  —  Bachmann erroneously touted New Hampshire as the site of the first battles of the American Revolutionary War.