By Kenny Bledsoe: Editor’s Note: Remembering the Columbine mass murder of April 20, 1999, on its 19th anniversary. I was in 9th grade when two teenagers donned black trench coats, armed themselves to the teeth, and set about systematically murdering 12 of their classmates and a teacher before killing themselves at Columbine High School in Colorado. Rumors swirled among the students the…