April-20-1999-Two-teenagers-open-fire-on-students-at-Columbine-high-school Post author By Phil Gurski Post date 2021-04-19 No Comments on April-20-1999-Two-teenagers-open-fire-on-students-at-Columbine-high-school By Phil Gurski Phil Gurski is the President and CEO of Borealis Threat and Risk Consulting Ltd. Phil is a 32-year veteran of CSE and CSIS and the author of six books on terrorism. View Archive → Leave a Reply Cancel replyYou must be logged in to post a comment.