The tragic legacy of Columbine continues.

During the month of April this year, there were more than 220 incidents or threats of violence in U.S. schools. More than 10% of these threats directly referenced Columbine either as an inspiration, or as a motivation. While we need to be concerned about safety every day, anniversaries of events such as Columbine create a need for extra vigilance.

For more information on the Educator's School Safety Network's ongoing research into school-based violent incidents and threats (formerly a bomb report), head to: http://eschoolsafety.org/bir/