German police escorts students back to the Albert-Einstein-High School in Sankt Augustin, western Germany, Monday, June 11, 2009. The students returned to their classrooms from a gym, where they were temporary evacuated after an alarm. Police are searching for a 16-year-old girl they suspect of stabbing another girl Monday at the Albert Einstein high school in Sankt Augustin, near Bonn. AP Photo logo AP Photo 33 months ago

German police escorts students back to the Albert-Einstein-High School in Sankt Augustin, western Germany, Monday, June 11, 2009. The students returned to their classrooms from a gym, where they were temporary evacuated after an alarm. Police are searching for a 16-year-old girl they suspect of stabbing another girl Monday at the Albert Einstein high school in Sankt Augustin, near Bonn.