Photo Gallery: The World's First School Massacre 06/20/2013
 One hundred years ago, on June 20, mass murderer Heinz Schmidt opened fire on...
Archiv der St.-Marien-Gemeinde Bremen/Hermann Sandkühler

One hundred years ago, on June 20, mass murderer Heinz Schmidt opened fire on girls and boys at the Marienschule school in Bremen, Germany, featured in this drawing. More than 1,000 children attended the Catholic school.