Four Columbine High School teachers were students the day of the April 20, 1999 shooting

Four Columbine High School teachers were at the school on April 20, 1999. Twenty years later, they work there. Columbine: 20 Years Later (full playlist): https://bit.ly/2GsSgmO More local videos here: https://bit.ly/2Pa0d1l Subscribe to NEXT: http://bit.ly/2eP1GwI Stay connected: 9NEWS Website: http://www.9news.com/ Facebook: https://www.facebook.com/ilike9news Twitter: https://twitter.com/9NEWS Instagram: https://www.instagram.com/9newsdenver/ Google+: https://plus.google.com/+9news/posts Snapchat: Denver9NEWS Pinterest: https://www.pinterest.com/9news/ 9NEWS (KUSA) is located in Denver, Colorado.