Final Photos Taken Seconds Before Tragedy Struck (13/20)

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Much has been said of the infamous school massacre that took place in Columbine, Colorado in 1999 but the deadliest high school shooting in US history prompted debate over gun control, goth culture and other far reaching and wide ranging subjects after the horrific events that took place. However, they could have been far worse had it not been for teacher David Sanders. Rushing to the packed cafeteria where many students were gathered, he warned that two gunmen were on the loose, allowing for may to make an escape as he fled into the hallway to find others to warn only to be gunned down himself, this photograph shows him leaving the cafeteria after issuing his warning.