11.   On Tuesday, automatic safety systems shut down a reactor at a Russian station near St. Petersburg after plant operators mistakenly switched off a generator.

12.   On Tuesday, automatic safety systems shut down a reactor at a Russian station near St. Petersburg.

13.   On Tuesday, automatic safety systems shut down a reactor near St. Petersburg after plant operators mistakenly switched off a generator.

14.   The fuel-free system shut down Thursday for the second time since the collision last week.

15.   When one application crashes on OS X, the system shuts down that program without affecting any others.